CCNA 4 Final Exam V4.0 Answers Updated 2012 100%

CCNA 4 Final Exam V4.0 Answers Updated 2011 100%

1. What functionality do access control lists provide in the implementation of dynamic NAT on a Cisco router?
define which addresses can be translated
define which addresses are assigned to a NAT pool
define which addresses are allowed out the router
define which addresses can be accessed from the inside network
2. Which three guidelines would help contribute to creating a strong password policy? (Choose three.)
Once a good password is created, do not change it.
Deliberately misspell words when creating passwords.
Create passwords that are at least 8 characters in length.
Use combinations of upper case, lower case, and special characters.
Write passwords in locations that can be easily retrieved to avoid being locked out.
Use long words found in the dictionary to make passwords that are easy to remember. Read more »

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Refer to the exhibit RIPv2 has been configured on all routers in the network Routers R1 and R3 have not received any RIP routing updates What will fix the issue?,acls final test answers,Which configuration on the vty lines provides the best security measure for network administrators to remotely access the core routers at headquarters?,ccna 2 v 4 0 final exam,Refer to the exhibit A network administrator configures a standard access control list on Router1 to prohibit traffic from the 192 168 0 0/24 network from reaching the Internet The access control list also permits traffic from the 192 168 0 0/24 network t,A network administrator configures a standard access control list on Router1 to prohibit traffic from the 192 168 0 0/24 network from reaching the Internet The access control list also permits traffic from the 192 168 0 0/24 network to reach the 192 168 1,ccna 4 practice final exam 1,ccna 4 final exam v4 0 answers,An issue of response time has recently arisen on an application server The new release of a software package has also been installed on the server The configuration of the network has changed recently To identify the problem individuals from both teams re,ccna 4 final exam answer

CCNA 4 Final answers (100% Guaranteed – Updated Dec 2010)

1. Which two statements are true about IPv6 link local addresses? (Choose two.)
They begin with the 2000::/3 prefix.
They begin with the FE80::/10 prefix.
They are assigned by IANA to an organization.
They must be manually configured by the administrator.
They are assigned to a host by a stateless autoconfiguration process.
2. Refer to the exhibit. What is another way to represent this IPv6 address?
2031::130F::9C0::130B
2031::130F::9C0:0:130B
2031:0:130F::9C0::130B
2031:0:130F::9C0:0:130B
3. Refer to the exhibit. A host connected to Fa0/0 is unable to acquire an IP address from the DHCP server. The output of the debug ip dhcp server command shows “DHCPD: there is no address pool for 192.168.3.17″. What is the problem?
The address 192.168.3.17 address is already in use by Fa0/0.
The pool of addresses for the 192Network pool is configured incorrectly.
The ip helper-address command should be used on the Fa0/0 interface.
The 192.168.3.17 address has not been excluded from the 192Network pool.
4. What will be the result of adding the command ip dhcp excluded-address 10.10.4.1 10.10.4.5 to the configuration of a local router that has been configured as a DHCP server?
Traffic that is destined for 10.10.4.1 and 10.10.4.5 will be dropped by the router.
Traffic will not be routed from clients with addresses between 10.10.4.1 and 10.10.4.5.
The DHCP server will not issue the addresses ranging from 10.10.4.1 to 10.10.4.5.
The router will ignore all traffic that comes from the DHCP servers with addresses 10.10.4.1 and 10.10.4.5.
5. Refer to the exhibit. PC1, PC2, and PC3 are configured with dynamic address assignments. PC2 is assigned an IP address from the DHCP server. What would account for the IP addresses that are currently assigned to PC1 and PC3?
Switch S2 port Fa0/12 is configured for full-duplex.
These addresses were included in the DHCP server pools.
Router R1 has a misconfigured IP address on interface Fa1/0.
R1 interface Fa0/0 is not in the same network as the DHCP server.
R1 interfaces Fa0/0 and Fa1/0 do not include the ip helper-address command.

6. Refer to the exhibit. R1 is performing NAT overload for the 10.1.1.0/24 inside network. Host A has sent a packet to Web Server. What is the destination IP address of the return packet from Web Server when received at R1?
10.1.1.2:80
10.1.1.2:1234
172.30.20.1:1234
172.30.20.1:3333
7. Refer to the exhibit. Which configuration command would result in the output in the exhibit?
ip nat inside source static 10.1.200.254 172.16.76.3
ip nat inside source static 10.1.200.254 192.168.0.10
ip nat inside source static 172.16.76.3 10.1.200.254
ip nat inside source static 172.16.76.3 192.168.0.10
ip nat inside source static 192.168.0.10 172.16.76.3
ip nat inside source static 192.168.0.10 10.1.200.254
8. At what physical location does the responsibilty for a WAN connection change from the user to the service provider?
demilitarized zone (DMZ)
demarcation point
local loop
cloud
9. Which additional functionality is available on an interface when the encapsulation is changed from HDLC to PPP?
flow control
error control
authentication
synchronous communication
10. Which statement accurately describes a role that is played in establishing a WAN connection?
ISDN and ATM are circuit-switched technologies that are used to establish on demand a path through the service provider network.
Data link layer protocols like PPP and HDLC define how data is encapsulated for transmission across a WAN link.
A packet-switching network establishes a dedicated circuit between nodes for the duration of the communication session.
Frame Relay switches are normally considered to be customer premises equipment (CPE) and are maintained by local administrators.
11. Which data link layer encapsulation protocol is used by default for serial connections between two Cisco routers?
ATM
Frame Relay
HDLC
PPP
SDLC
12. Refer to the exhibit. A network administrator is creating a prototype to verify the new WAN design. However, the communication between the two routers cannot be established. Based on the output of the commands, what can be done to solve the problem?
Replace the serial cable .
Replace the WIC on RA.
Configure RA with a clock rate command.
Issue a no shutdown interface command on RB.
13. Which protocol is used to authenticate connections over serial links securely?
CHAP
HDLC
SLIP
PAP
14. Which statement is true about PAP in the authentication of a PPP session?
PAP uses a two-way handshake.
The password is unique and random.
PAP conducts periodic password challenges.
PAP uses MD5 hashing to keep the password secure.
15. What is an accurate description of CHAP when used with PPP on a serial connection between two routers?
A username and password are sent to the peer router, which replies with an accept or reject message.
A username and password are sent to the peer router. If these match the configuration in the peer, the peer in turn provides a username and password to the initiating router.
A challenge message is sent to the peer router, which responds with its username and a calculated value based on a shared secret. This value is then compared by the challenger to its own calculations.
An encrypted password is sent to the peer router, which decrypts it and compares it to a shared secret. If the decrypted passwords match, the peer sends the encrypted password back to the initiating router.
16. Refer to the exhibit. Communication between two peers has failed. Based on the output that is shown, what is the most likely cause?
interface reset
unplugged cable
improper LMI type
PPP negotiation failure
17. When configuring a Frame Relay connection, what is the purpose of Inverse ARP?
to assign a DLCI to a remote peer
to disable peer requests from determining local Layer 3 addresses
to negotiate LMI encapsulations between local and remote Frame Relay peers
to create a mapping of DLCI to Layer 3 addresses that belong to remote peers
18. A company is looking for a WAN solution to connect its headquarters site to four remote sites. What are two advantages that dedicated leased lines provide compared to a shared Frame Relay solution? (Choose two.)
reduced jitter
reduced costs
reduced latency
the ability to burst above guaranteed bandwidth
the ability to borrow unused bandwidth from the leased lines of other customers
19. Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the San Jose router to the DC router?
DLCI 103
DLCI 301
172.16.1.18
172.16.1.19
20. Which option correctly defines the capacity through the local loop guaranteed to a customer by the service provider?
BE
DE
CIR
CBIR
21. When Frame Relay encapsulation is used, what feature provides flow control and exchanges information about the status of virtual circuits?
LCP
LMI
DLCI
Inverse ARP
22. Refer to the exhibit. Branch A has a non-Cisco router that is using IETF encapsulation and Branch B has a Cisco router. After the commands that are shown are entered, R1 and R2 fail to establish the PVC. The R2 LMI is Cisco, and the R1 LMI is ANSI. The
LMI is successfully established at both locations. Why is the PVC failing?
The PVC to R1 must be point-to-point.
LMI types must match on each end of a PVC.
The frame relay PVCs cannot be established between Cisco and non-Cisco routers.
The IETF parameter is missing from the frame-relay map ip 10.10.10.1 201 command.
23. Refer to the exhibit. You are a network administrator who has been tasked with completing the Frame Relay topology that interconnects two remote sites. How should the point-to-point subinterfaces be configured on HQ to complete the topology?
HQ(config-subif)# frame-relay map ip 172.16.1.1 301 broadcast on Serial 0/0/0.1
HQ(config-subif)# frame-relay map ip 172.16.2.2 302 broadcast on Serial 0/0/0.2
HQ(config-subif)# frame-relay map ip 172.16.1.1 103 broadcast on Serial 0/0/0.1
HQ(config-subif)# frame-relay map ip 172.16.2.2 203 broadcast on Serial 0/0/0.2
HQ(config-subif)# frame-relay interface-dlci 103 on Serial 0/0/0.1
HQ(config-subif)# frame-relay interface-dlci 203 on Serial 0/0/0.2
HQ(config-subif)# frame-relay interface-dlci 301 on Serial 0/0/0.1
HQ(config-subif)# frame-relay interface-dlci 302 on Serial 0/0/0.2
24. Refer to the exhibit. Which statement is true about the Frame Relay connection?
The Frame Relay connection is in the process of negotiation.
A congestion control mechanism is enabled on the Frame Relay connection.
The “ACTIVE” status of the Frame Relay connection indicates that the network is experiencing congestion.
Only control FECN and BECN bits are sent over the Frame Relay connection. No data traffic traverses the link.
25. Which IEEE 802.16 broadband wireless technology allows users to connect to the ISP at speeds comparable to DSL and cable?
Wi-Fi
satellite
WiMAX
Metro Ethernet
26. What are two main components of data confidentiality? (Choose two.)
checksum
digital certificates
encapsulation
encryption
hashing
27. Which statement about a VPN is true?
VPN link establishment and maintenance is provided by LCP.
DLCI addresses are used to identify each end of the VPN tunnel.
VPNs use virtual Layer 3 connections that are routed through the Internet.
Only IP packets can be encapsulated by a VPN for tunneling through the Internet.
28. From observing lots of port scans and ping sweeps on the company network, an administrator has determined that an edge router is experiencing an attack. These exploits are examples of what type of network attack?
DoS
access
reconnaissance
man-in-the-middle
29. A network administrator determines that falsified routing information is propagating through the network.
What action can be used to address this threat?
Update the IOS images.
Change console passwords.
Employ end-user authentication.
Configure routing protocol authentication.
30. Refer to the exhibit. Which statement is true about the configuration of R1?
The remote session is encrypted.
A password is sent in plain text.
A connection that is using secure HTTP is enabled.
A local username database is used for authentication.
31. What can a network administrator do to recover from a lost router password?
use the copy tftp: flash: command
boot the router to bootROM mode and enter the b command to load the IOS manually
telnet from another router and issue the show running-config command to view the password
boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes
32. Refer to the exhibit. A network administrator is trying to backup the IOS software on R1 to the TFTP server. He receives the error message that is shown in the exhibit, and cannot ping the TFTP server from R1. What is an action that can help to isolate this problem?
Use correct source file name in the command.
Verify that the TFTP server software is running.
Make sure that there is enough room on the TFTP server for the backup.
Check that R1 has a route to the network where the TFTP server resides.
33. Refer to the exhibit. A network administrator is considering updating the IOS on Router1. What version of IOS is currently installed on Router1?
1
12.4
15
1841
34. Which statement is true about wildcard masks?
A wildcard mask must be created by inverting the subnet mask.
A wildcard mask performs the same function as a subnet mask.
A wildcard mask of 0.0.0.0 means the address should match exactly.
A wildcard mask uses a “1″ to identify IP address bits that must be checked.
35. Which type of ACL will permit traffic inbound into a private network only if an outbound session has already been established between the source and destination?
extended
reflexive
standard
time-based
36. Which variable is permitted or denied by a standard access control list?
protocol type
source IP address
source MAC address
destination IP address
destination MAC address
37. A technician is editing and reapplying ACL 115 to a router, what is the result of adding the command access-list 115 permit tcp any 172.16.0.0 0.0.255.255 established to the ACL when it is reapplied to the router?
All traffic that comes from 172.16.0.0/16 will be allowed.
All TCP traffic that is destined for 172.16.0.0/16 is permitted.
Any SYN packets that are sent to 172.16.0.0/16 will be permitted.
Responses to traffic that originates from the 172.16.0.0/16 network are allowed.
38. Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic from the 192.168.1.0/24 network from reaching the 192.168.2.0/24 network while still permitting Internet access for all networks. On which router interface and in which direction should it be applied?
interface Fa0/0, inbound
interface Fa0/0, outbound
interface Fa0/1, inbound
interface Fa0/1, outbound
39. Which option represents a best practice for applying ACLs?
Named ACLs are less efficient than numbered ACLs.
Standard ACLs should be applied inside the core layer.
ACLs applied to outbound interfaces use fewer router resources.
Extended ACLs should be applied closest to the source that is specified by the ACL.
40. Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request packet that enters interface S0/0/0, and is destined for an FTP server at IP address 172.16.1.5?
The router matches the incoming packet to the statement that is created by access-list 201 permit ip any any command and allows the packet into the router.
The router reaches the end of ACL 101 without matching a condition and drops the packet because there is no statement that was created by access-list 101 permit ip any any command.
The router matches the incoming packet to the statement that was created by the access-list 101 permit ip any 172.16.1.0 0.0.0.255 command, ignores the remaining statements in ACL 101, and allows the packet into the router.
The router matches the incoming packet to the statement that was created by the access-list 201 deny icmp 172.16.1.0 0.0.0.255 any command, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then the router drops the packet.
41. A network administrator has moved the company intranet web server from a switch port to a dedicated router interface. How can the administrator determine how this change has affected performance and availability on the company intranet?
Conduct a performance test and compare with the baseline that was established previously.
Determine performance on the intranet by monitoring load times of company web pages from remote sites.
Interview departmental administrative assistants and determine if they think load time for web pages has improved.
Compare the hit counts on the company web server for the current week to the values that were recorded in previous weeks.
42. Technicians from Company A and Company B are comparing DSL transfer rates at their respective companies. Both companies are in the same city, use the same service provider, and have the same rate/service plan. Company A, however, reports higher download speeds than Company B. Which option best explains the reason for Company A having the higher download speeds?
Company A only uses microfilters on branch locations.
Company B has a higher volume of POTS voice traffic than does Company A.
Company B shares the connection to the DSLAM with a larger number of clients than Company A shares.
The length of the local loop between Company A and the CO is shorter than the length of the local loop between Company B and CO.
43. Which characteristic of VPN technology prevents the contents of data communications from being read by unauthorized parties?
QoS
latency
reliability
confidentiality
44. A recently patched application server is experiencing response time problems. The network on which the application server is located has been experiencing occasional outages that the network team believes may be related to recent routing changes. Network and application teams have been notified to work on their respective issues. Which statement applies to this situation?
Only results from the software package should be tested as the network is designed to accommodate the proposed software platform.
Scheduling will be easy if the network and software teams work independently.
It will be difficult to isolate the problem if two teams are implementing changes independently.
Results from changes will be easier to reconcile and document if each team works in isolation.
45. Because of a remote-procedure call failure, a user is unable to access an NFS server. At what layer of the TCP/IP model does this problem occur?
network layer
data link layer
physical layer
application layer
46. Refer to the exhibit. The corporate network that is shown has been assigned network 172.16.128.0/19 for use at branch office LANs. If VLSM is used, what mask should be used for addressing hosts at Branch4 with minimal waste from unused addresses?
/19
/20
/21
/22
/23
/24
47. Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to ping the default gateway. What is the cause of the problem?
The default gateway is in the wrong subnet.
STP has blocked the port that PC1 is connected to.
Port Fa0/2 on S2 is assigned to the wrong VLAN.
S2 has the wrong IP address assigned to the VLAN30 interface.
48. Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1 and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing from S2?
There is a Layer 2 loop.
The VTP domain names do not match.
Only one switch can be in server mode.
S2 has a higher spanning-tree priority for VLAN 11 than S1 does.
49. Refer to the exhibit. Routers R1 and R2 have been configured with EIGRP in the same autonomous system. Computers PC1 and PC2 are not able to ping each other. Further investigation has revealed that the route to 192.168.10.0 is missing from the routing table on R2. What is the cause of the problem?
The networks are not correctly summarized.
The FastEthernet interfaces on R1 are configured as passive.
The network statements on R2 are incorrectly configured.
EIGRP on R1 does not recognize the 192.168.10.0 network.
50. Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 have not received any RIP routing updates. What will fix the issue?
Enable RIP authentication on R2.
Issue the ip directed-broadcast command on R2.
Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2.
Enable CDP on R2 so that the other routers will receive routing updates.

CCNA 4 Final Exam

CCNA 4 Final Exam

1. Which functions are provided by LCP and NCP as part of the PPP layered architecture?
LCP sets up the PPP connection and its parameters. NCP terminates the PPP connection.
LCP sets up the PPP connection and its parameters. NCP handles higher layer protocol configurations.
LCP includes the link-establishment phase. NCP includes link-maintenance and link-termination phases.
LCP negotiates options for multiple network layer protocols. NCP agrees automatically on encapsulation formats.

2.

Refer to the exhibit. EIGRP has been configured on routers R1 and R2. Connectivity across the Frame Relay switch between routers R1 and R2 is successfully verified using the ping command. However, no EIGRP routes are appearing in the routing table. What could be a cause for this failure?
The Frame Relay switch has failed.
The frame-relay map statement is incorrect.
The S0/0/0 interface of router R1 is administratively down.
The S0/0/0 interface of router R2 has an incorrect IP address.


3.

Refer to the exhibit. Results of the show vlan and show vtp status commands for switches S1 and S2 are displayed in the exhibit. VLAN 11 was created on S1. Why is VLAN 11 missing from S2?
There is a Layer 2 loop.
The VTP domain names do not match.
Only one switch can be in server mode.
S2 has a higher spanning-tree priority for VLAN 11 than S1 does.

4.

Refer to the exhibit. A network administrator is considering updating the IOS on Router1. What version of IOS is currently installed on Router1?
1
12.4
15
1841

5.

Refer to the exhibit. What is placed in the address field in the header of a frame that will travel from the San Jose router to the DC router?
DLCI 103
DLCI 301
172.16.1.18
172.16.1.19

6. A company is looking for a WAN solution to connect its headquarters site to four remote sites. What are two advantages that dedicated leased lines provide compared to a shared Frame Relay solution? (Choose two.)
reduced jitter
reduced costs
reduced latency
the ability to burst above guaranteed bandwidth
the ability to borrow unused bandwidth from the leased lines of other customers

7.

Refer to the exhibit. Partial results of the show access-lists and show ip interface FastEthernet 0/1 commands for router Router1 are shown. There are no other ACLs in effect. Host A is unable to telnet to host B. Which action will correct the problem but still restrict other traffic between the two networks?
Apply the ACL in the inbound direction.
Apply the ACL on the FastEthernet 0/0 interface.
Reverse the order of the TCP protocol statements in the ACL.
Modify the second entry in the list to permit tcp host 172.16.10.10 any eq telnet .

8. Which combination of authentication and Layer 2 protocol should be used to establish a link between a Cisco and a non-Cisco router without sending authentication information in plain text?
CHAP and HDLC
CHAP and PPP
PAP and HDLC
PAP and PPP

9. Which statement is true about wildcard masks?
A wildcard mask must be created by inverting the subnet mask.
A wildcard mask performs the same function as a subnet mask.
A wildcard mask of 0.0.0.0 means the address should match exactly.
A wildcard mask uses a "1" to identify IP address bits that must be checked.

10.

Refer to the exhibit. ACL 120 is configured to allow traffic coming from 192.168.10.0/24 network to go to any destination limited to ports 80 and 443. ACL 130 should allow only requested HTTP traffic to flow back into the network. What additional configuration is needed in order for the access lists to fulfill the requirements?





11.

Refer to the exhibit. Communication between two peers has failed. Based on the output that is shown, what is the most likely cause?
interface reset
unplugged cable
improper LMI type
PPP negotiation failure

12.

Refer to the exhibit. Which statement about the configuration is true?
10.10.10.1 is most likely assigned to the local LAN interface.
10.10.10.1 through 10.10.10.255 is available to be assigned to users.
All DHCP clients looking for an IP address will use 10.10.10.1 and 10.10.10.2.
All DHCP clients in the 10.10.10.0/24 network will use 10.10.10.2 as the default gateway.

13. Which statement is true about an interface that is configured with the IPv6 address command?
IPv6 traffic-forwarding is enabled on the interface.
A link-local IPv6 address is automatically configured on the interface.
A global unicast IPv6 address is dynamically configured the interface.
Any IPv4 addresses that are assigned to the interface are replaced with an IPv6 address.

14.

Refer to the exhibit. Which data transmission technology is being represented?
TDM
PPP
HDLC
SLIP

15. Which statement is true about PAP in the authentication of a PPP session?
PAP uses a two-way handshake.
The password is unique and random.
PAP conducts periodic password challenges.
PAP uses MD5 hashing to keep the password secure.

16. What can a network administrator do to recover from a lost router password?
use the copy tftp: flash: command
boot the router to bootROM mode and enter the b command to load the IOS manually
telnet from another router and issue the show running-config command to view the password
boot the router to ROM monitor mode and configure the router to ignore the startup configuration when it initializes

17. A system administrator must provide Internet connectivity for ten hosts in a small remote office. The ISP has assigned two public IP addresses to this remote office. How can the system administrator configure the router to provide Internet access to all ten users at the same time?
Configure static NAT.
Configure dynamic NAT.
Configure static NAT with overload.
Configure dynamic NAT with overload.

18. Which statement is true about the PPP authentication phase?
CHAP uses a 2-way handshake to exchange the credentials.
PAP can perform continuous authentication after a link is established.
CHAP sends an encrypted username and password during the authentication process.
The authentication phase takes place before the NCP configuration phase begins.

19.

Refer to the exhibit. A network administrator is configuring Frame Relay on router HQ. It is desired that each Frame Relay PVC between the routers be in a separate subnet. Which two commands on HQ will accomplish this task for the connection to R1? (Choose two.)
HQ(config)# interface S0/0/0
HQ(config)# interface S0/0/0.1 multipoint
HQ(config)# interface S0/0/0.1 point-to-point
HQ(config-subif)# frame-relay interface dlci 103
HQ(config-subif)# frame-relay interface dlci 301
HQ(config-if)# frame-relay map ip 172.16.1.1 255.255.255.0 301 broadcast

20. Which wildcard mask would specify all IP addresses from 192.168.8.0 through 192.168.15.255?
0.0.0.7
0.0.7.255
0.0.8.255
0.0.15.255
0.0.255.255

21.

Refer to the exhibit. WestSW is supposed to send VLAN information to EastSW, but that did not occur. What will force WestSW to send a VLAN update to EastSW?
Change EastSW to be a VTP server.
Reload both WestSW and EastSW at the same time.
Erase the VLAN database on EastSW and reload the switch.
Reset the configuration revision number on EastSW to zero.
Reload EastSW.

22. Which additional functionality is available on an interface when the encapsulation is changed from HDLC to PPP?
flow control
error control
authentication
synchronous communication

23. Which three guidelines would help contribute to creating a strong password policy? (Choose three.)
Once a good password is created, do not change it.
Deliberately misspell words when creating passwords.
Create passwords that are at least 8 characters in length.
Use combinations of upper case, lower case, and special characters.
Write passwords in locations that can be easily retrieved to avoid being locked out.
Use long words found in the dictionary to make passwords that are easy to remember.

24. Which three physical network problems should be checked when a bottom-up troubleshooting approach has been chosen to troubleshoot network performance? (Choose three.)
cable connectivity
high collision counts
STP failures and loops
address mapping errors
high CPU utilization rates
excess packets that are filtered by the firewall

25. A network administrator has changed the VLAN configurations on his network switches over the past weekend. How can the administrator determine if the additions and changes improved performance and availability on the company intranet?
Conduct a performance test and compare with the baseline that was established previously.
Interview departmental secretaries and determine if they think load time for web pages has improved.
Determine performance on the intranet by monitoring load times of company web pages from remote sites.
Compare the hit counts on the company web server for the current week to the values that were recorded in previous weeks.

26.

Refer to the exhibit. Users who are connected to R1 report that they are unable to establish connectivity to the users who are connected to router R2. A network administrator tests the link with the debug ppp authentication command. Based on the output shown, which statement correctly defines the problem on the link?
R1 uses PAP as a method of authentication, and R2 uses CHAP.
R1 uses CHAP as a method of authentication, and R2 uses PAP.
R1 uses an incorrect user name or password for CHAP authentication.
R2 uses an incorrect user name or password for PAP authentication.

27.

Refer to the exhibit. All devices are configured as shown in the exhibit. PC1 is unable to ping the default gateway. What is the cause of the problem?
The default gateway is in the wrong subnet.
STP has blocked the port that PC1 is connected to.
Port Fa0/2 on S2 is assigned to the wrong VLAN.
S2 has the wrong IP address assigned to the VLAN30 interface.

28. What is the result when the command permit tcp 192.168.4.0 0.0.3.255 any eq telnet is entered in an access control list and applied on the inbound interface of a router?
All traffic that originates from 192.168.4.0/24 is permitted.
All TCP traffic is permitted, and all other traffic is denied.
All Telnet traffic from the 192.168.0.0/16 network is permitted.
All traffic from the 192.168.4.0/22 network is permitted on TCP port 23.

29.

Refer to the exhibit. Router RT is not receiving routing updates from router RTA. What is causing the problem?
The ip rip authentication key-chain command specifies exam rather than test.
The name of the keystring is not the name of the neighboring router.
The key chains are given the same name on both routers.
The passive-interface command was issued for RTA.

30. An administrator is configuring a dual stack router with IPv6 and IPv4 using RIPng. The administrator receives an error message when trying to enter the IPv4 routes into RIPng. What is the cause of the problem?
When IPv4 and IPv6 are configured on the same interface, all IPv4 addresses are over-written in favor of the newer technology.
Incorrect IPv4 addresses are entered on the router interfaces.
RIPng is incompatible with dual-stack technology.
IPv4 is incompatible with RIPng.

31. Which encapsulation protocol when deployed on a Cisco router over a serial interface is only compatible with another Cisco router?
PPP
SLIP
HDLC
Frame Relay

32.

Refer to the exhibit. The corporate network that is shown has been assigned network 172.16.128.0/19 for use at branch office LANs. If VLSM is used, what mask should be used for addressing hosts at Branch4 with minimal waste from unused addresses?
/19
/20
/21
/22
/23
/24

33. A technician has been asked to run Cisco SDM one-step lockdown on the router of a customer. What will be the result of this process?
Traffic is only forwarded from SDM-trusted Cisco routers.
Security testing is performed and the results are saved as a text file stored in NVRAM.
The router is tested for potential security problems and any necessary changes are made.
All traffic entering the router is quarantined and checked for viruses before being forwarded.

34. What translation method will allow a server to always keep the same public address?
static NAT
dynamic NAT
static NAT with overload
dynamic NAT with overload

35. A network administrator is tasked with maintaining two remote locations in the same city. Both locations use the same service provider and have the same service plan for DSL service. When comparing download rates, it is noticed that the location on the East side of town has a faster download rate than the location on the West side of town. How can this be explained?
The West side has a high volume of POTS traffic.
The West side of town is downloading larger packets.
The service provider is closer to the location on the East side.
More clients share a connection to the DSLAM on the West side.

36. A light manufacturing company wishes to replace its DSL service with a non-line-of-sight broadband wireless solution that offers comparable speeds. Which solution should the customer choose?
Wi-Fi
satellite
WiMAX
Metro Ethernet

37.

Refer to the exhibit. Company ABC expanded its business and recently opened a new branch office in another country. IPv6 addresses have been used for the company network. The data servers Server1 and Server2 run applications which require end-to-end functionality, with unmodified packets that are forwarded from the source to the destination. The edge routers R1 and R2 support dual stack configuration. What solution should be deployed at the edge of the company network in order to successfully interconnect both offices?
a new WAN service supporting only IPv6
NAT overload to map inside IPv6 addresses to outside IPv4 address
a manually configured IPv6 tunnel between the edge routers R1 and R2
static NAT to map inside IPv6 addresses of the servers to an outside IPv4 address and dynamic NAT for the rest of the inside IPv6 addresses

38.

Refer to the exhibit. Which statement correctly describes how Router1 processes an FTP request packet that enters interface S0/0/0, and is destined for an FTP server at IP address 172.16.1.5?
The router matches the incoming packet to the statement that is created by access-list 201 permit ip any any command and allows the packet into the router.
The router reaches the end of ACL 101 without matching a condition and drops the packet because there is no statement that was created by access-list 101 permit ip any any command.
The router matches the incoming packet to the statement that was created by the access-list 101 permit ip any 172.16.1.0 0.0.0.255 command, ignores the remaining statements in ACL 101, and allows the packet into the router.
The router matches the incoming packet to the statement that was created by the access-list 201 deny icmp 172.16.1.0 0.0.0.255 any command, continues comparing the packet to the remaining statements in ACL 201 to ensure that no subsequent statements allow FTP, and then the router drops the packet.

39. Which characteristic of VPN technology prevents the contents of data communications from being read by unauthorized parties?
QoS
latency
reliability
confidentiality

40. Which technology is used to dynamically map next hop, network layer addresses to virtual circuits in a Frame Relay network?
Inverse ARP
LMI
DLCI
FECN

41.

Refer to the exhibit. A technician is teaching a trainee to interpret the results of various Frame Relay troubleshooting commands. What conclusion can be drawn from the output that is shown?
Neighboring routers should use DLCI 177 to reach the Branch router.
DLCI 177 will be used to identify all broadcasts that are sent out the Branch router.
The Branch router has the address 192.168.3.1 configured for the S0/0/0 interface.
To reach 192.168.3.1, the Branch router will use the virtual circuit that is identified by DLCI 177.

42. Where does a service provider assume responsibility from a customer for a WAN connection?
local loop
DTE cable on router
demarcation point
demilitarized zone

43. A company has its headquarters office in Dallas and five branch offices located in New York, Chicago, Los Angeles, Seattle, and Atlanta. WAN links are used for communications among offices in six sites. In planning the WAN links, the network designer is given two requirements: (1) minimize cost and (2) provide a certain level of WAN link reliability with redundant links. Which topology should the network designer recommend?
star
full mesh
hierarchical
partial mesh

44.

Refer to the exhibit. A system administrator must provide connectivity to a foreign network for ten hosts in a small remote office. The commands that are listed in the exhibit were entered into the router that connects the foreign network. The users in the remote office report occasional failure to connect to resources in the foreign network. What is the likely problem?
The source addresses are not correctly designated.
The translated address pool is not correctly sized.
The access-list command is referencing the wrong addresses.
The wrong interface is designated as the source for translations.

45. An issue of response time has recently arisen on an application server. The new release of a software package has also been installed on the server. The configuration of the network has changed recently. To identify the problem, individuals from both teams responsible for the recent changes begin to investigate the source of the problem. Which statement applies to this situation?
Scheduling will be easy if the network and software teams work independently.
It will be difficult to isolate the problem if two teams are implementing changes independently.
Results from changes will be easier to reconcile and document if each team works in isolation.
Only results from the software package should be tested as the network is designed to accommodate the proposed software platform.

46. Which method is most effective in protecting the routing information that is propagated between routers on the network?
Disable IP source routing.
Configure passive interfaces.
Configure routing protocol authentication.
Secure administrative lines with Secure Shell.

47.

Refer to the exhibit. What happens if the network administrator issues the commands shown when an ACL called Managers already exists on the router?
The commands overwrite the existing Managers ACL.
The commands are added at the end of the existing Managers ACL.
The network administrator receives an error stating that the ACL already exists.
The commands will create a duplicate Managers ACL containing only the new commands being entered.

48. Which statement accurately describes a role that is played in establishing a WAN connection?
ISDN and ATM are circuit-switched technologies that are used to establish on demand a path through the service provider network.
Data link layer protocols like PPP and HDLC define how data is encapsulated for transmission across a WAN link.
A packet-switching network establishes a dedicated circuit between nodes for the duration of the communication session.
Frame Relay switches are normally considered to be customer premises equipment (CPE) and are maintained by local administrators.

49. What are two main components of data confidentiality? (Choose two.)
checksum
digital certificates
encapsulation
encryption
hashing

50. When NAT is in use, what is used to determine the addresses that can be translated on a Cisco router?
access control list
routing protocol
inbound interface
ARP cache

51.

Refer to the exhibit. Branch A has a non-Cisco router that is using IETF encapsulation and Branch B has a Cisco router. After the commands that are shown are entered, R1 and R2 fail to establish the PVC. The R2 LMI is Cisco, and the R1 LMI is ANSI. The LMI is successfully established at both locations. Why is the PVC failing?
The PVC to R1 must be point-to-point.
LMI types must match on each end of a PVC.
The frame relay PVCs cannot be established between Cisco and non-Cisco routers.
The IETF parameter is missing from the frame-relay map ip 10.10.10.1 201 command.

52.

Refer to the exhibit. RIPv2 has been configured on all routers in the network. Routers R1 and R3 have not received any RIP routing updates. What will fix the issue?
Enable RIP authentication on R2.
Issue the ip directed-broadcast command on R2.
Change the subnet masks to 10.11.12.0/8 and 172.16.40.0/16 on R2.
Enable CDP on R2 so that the other routers will receive routing updates.

53. A network administrator can ping the Perth router, but gets a ‘Password Required but None Set’ message when trying to connect remotely via Telnet. Which command sequence must be applied to the Perth router to allow remote access?
Router(config)# line console 0 Router(config-line)# login Router(config-line)# password cisco
Router(config)# line vty 0 4 Router(config-line)# login Router(config-line)# password cisco
Router(config)# line virtual terminal Router(config-line)# enable login Router(config-line)# password cisco
Router(config)# line vty 0 4 Router(config-line)# enable secret Router(config-line)# password cisco
Router(config)# enable secret cisco Router(config)# enable cisco

54. A router does not load its configuration after a power failure. After running the show startup-configuration command, the administrator finds that the original configuration is intact. What is the cause of this problem?
The configuration register is set for 0×2100.
The configuration register is set for 0×2101.
The configuration register is set for 0×2102.
The configuration register is set for 0×2142. Boot system commands are not configured.
Flash memory is empty causing the router to bypass the configuration in NVRAM

CCNA 4 EXPLORATION (VERSION 4) Chapitre 8

 

CCNA 4 EXPLORATION (VERSION 4) 

 

Chapitre 8

 

1 Un nombre élevé de collisions est souvent significatif de problèmes affectant quelle couche ? Physique Liaison de données Réseau Transport

2 Lors de l’inventaire des symptômes pour le dépannage d’un problème de réseau, quelle est l’étape qui peut résulter en l’intervention d’un administrateur externe dans le processus ? La réduction de l’étendue des causes probables L’inventaire des symptômes des périphériques suspects L’analyse des symptômes existants La détermination de la propriété

Lisez l’exposé. Quelles sont les deux étapes à suivre lors de la création de la documentation réseau ? (Choisissez deux réponses.) L’enregistrement des informations relatives aux périphériques découverts dans le réseau du campus uniquement. L’enregistrement des informations relatives aux périphériques découverts dans l’ensemble du réseau, y compris les sites distants Le transfert de toute information relative aux périphériques de la table de configuration réseau et qui correspond à un composant du schéma topologique. Le transfert des informations provenant uniquement des couches 2 et 3 relatives aux périphériques de la table de configuration réseau et qui correspondent à un composant du schéma topologique. Le transfert des informations enregistrées relatives aux périphériques de la table de configuration réseau, collectées pendant les périodes d’utilisation de pointe du réseau et qui correspondent à un composant du schéma topologique.

4 Un nombre excessif de diffusions est généralement significatif d’un problème affectant quelle couche ? Physique Liaison de données Réseau Transport

5 Lisez l’exposé. L’une des applications du serveur des ressources humaines ne répond plus à aucune requête des clients. Chaque transaction dépend de plusieurs serveurs dans le centre de calcul. À l’échelle de l’entreprise, les applications exécutées sur les serveurs dans le centre de calcul ne posent aucun problème. Le personnel n’a aucune expérience de ce genre de défaillance et les connaissances des diverses applications en interne sont limitées. Quelles étapes de dépannage constitueraient le point de départ d’une méthode descendante ? Vérifier l’ensemble des connexions de câble serveur. Vérifier les voyants de connexion verts sur chaque carte réseau. Effectuer un test ping de l’adresse locale de chaque serveur, suivi par un test des adresses des serveurs dépendants et d’un échantillon de clients. Utiliser la console de contrôle d’application sur chaque serveur pour assurer que l’application est exécutée. Vérifier les journaux d’événements sur les serveurs d’applications pour les messages d’erreur spécifiques à une application. Vérifier les connexions des clients dans les consoles de sessions pour les serveurs qui possèdent des outils de gestion de session. Tester la connectivité IP entre les clients et les serveurs. Passer aux couches supérieures si la connectivité IP s’avère correcte. Vérifier les problèmes de réseau si la connectivité n’est pas correcte. Réinstaller les applications affectées sur les serveurs. Si l’application ne répond toujours pas, réinstaller le client sur l’un des ordinateurs individuels.

6 Un technicien doit dépanner un réseau commuté existant, mais ne parvient pas à localiser la documentation relative à la configuration du réseau local virtuel. Quel est l’outil de dépannage qui permet au technicien de mapper et de découvrir les affectations des réseaux locaux virtuels et des ports ? Un analyseur de câble Un analyseur réseau Un analyseur de protocole Une base de connaissances

7 Lisez l’exposé. Les graphiques proviennent de HR-1, un serveur d’applications unique utilisé par la section des ressources humaines. La collecte des données de ligne de base a commencé le 1er août. Quels sont les renseignements utiles qui peuvent être déterminés à partir des graphiques ?   Les ressources d’UC sur HR-1 ne sont pas correctement équilibrées. Le cycle de traitement a besoin d’être ajusté. En fin de semaine, il existe deux cycles de traitement distincts qui commencent le samedi soir pour se terminer le dimanche matin. Les graphiques de ligne de base indiquent que HR-1 connaît assurément un problème de traitement, mais que la nature de celui-ci n’est pas encore connue. La charge de traitement sur HR-1 est répétitive et, de ce fait, prévisible. Quelque chose a un impact net sur les charges d’UC sur HR-1. Les informations sont insuffisantes pour déterminer si un problème existe.
8 Les clients de l’entreprise signalent de mauvaises performances sur l’ensemble des applications de l’entreprise exécutées dans le centre de calcul. L’accès à Internet et les applications exécutées sur le réseau étendu de l’entreprise fonctionnent normalement. L’administrateur réseau observe sur un analyseur de protocole une diffusion constante d’un trafic aléatoire et insignifiant (erreur de message trop long ou « jabber ») sur le réseau local de serveur d’applications. Comment l’administrateur doit-il commencer le dépannage ? Le jabber dans le centre de calcul indique un problème de couche physique locale. Utiliser l’analyseur de protocole pour déterminer la source du jabber, puis contrôler la mise à jour récente d’un pilote de carte réseau ou une erreur de câblage. Comme tous les clients rencontrent des problèmes d’applications, l’administrateur doit adopter une approche descendante avec les serveurs d’applications dans le centre de calcul. L’étendue du problème est significative d’un problème probable de routage ou de protocole « Spanning Tree ». Commencer par vérifier les tables de routage, puis poursuivre avec l’utilisation des commandes STP show appropriées pour identifier une boucle si le routage fonctionne normalement. Se renseigner auprès du personnel pour déterminer si des modifications récentes ont été effectuées. Restaurer la configuration en annulant chaque modification une par une jusqu’à correction de la condition d’erreur.

9 Lisez l’exposé. Les utilisateurs sur le réseau local interne ne parviennent pas à se connecter au serveur Web. L’administrateur réseau fait un test ping du serveur et vérifie que la fonction NAT fonctionne correctement. Par quelle couche OSI l’administrateur doit-il commencer sa procédure de dépannage ? Physique Liaison de données Réseau Application

10 Quels sont les deux éléments généralement trouvés sur un diagramme de réseau logique ? (Choisissez deux réponses.) Les identifiants d’interfaces Les types de connecteurs Les versions du système d’exploitation Les types de câbles Les circuits virtuels

11 Parmi les symptômes suivants, lequel est significatif d’un problème de couche physique ? Une encapsulation incorrecte Une configuration STP incorrecte Un mappage ARP incorrect Une fréquence d’horloge incorrecte

12 Quelles sont les deux affirmations vraies relatives aux modèles de réseaux logiques ? (Choisissez deux réponses.) Le protocole TCP/IP divise la couche la plus basse du modèle OSI en deux couches distinctes. La couche supérieure du modèle TCP/IP combine les fonctions des trois couches OSI supérieures. Le dépannage avec le modèle TCP/IP nécessite des techniques différentes de celles du dépannage avec le modèle OSI. La couche d’accès réseau est responsable de l’échange des paquets entre les périphériques sur un réseau TCP/IP. La couche Internet permet les communications entre les applications, comme les protocoles FTP, HTTP et SMTP sur des hôtes distincts. La couche d’accès réseau TCP/IP correspond aux couches OSI physique et liaison de données.

13 Lisez l’exposé. Selon les informations affichées à l’invite de commandes de l’administrateur, quelles sont les couches OSI qui fonctionnent correctement ? Les couches 1 et 2 Les couches 1 à 3 Les couches 1 à 4 Les couches 1 à 7

14 Quelles sont les trois instructions qui doivent être utilisées pour formuler les questions destinées à la collecte d’informations auprès des utilisateurs ? (Choisissez trois réponses.) Déterminez la séquence d’événements qui s’est déroulée avant que le problème ne se manifeste. Déterminez si l’erreur incombe à l’utilisateur. Tentez de gagner la confiance de l’utilisateur en utilisant autant que possible des termes techniques. Commencez par les questions banales destinées à établir un bon rapport avec l’utilisateur. Utilisez chaque question de manière à découvrir ou supprimer des problèmes potentiels. Demandez à l’utilisateur de recréer le problème, si possible.

15 Quelle procédure de dépannage est conseillée pour traiter les problèmes complexes soupçonnés d’être causés par un câblage de réseau défectueux ? Ascendante Descendante Diviser et conquérir Du centre aux extrémités

16 Lisez l’exposé. L’une des applications du serveur des ressources humaines ne répond plus à aucune requête des clients. Chaque transaction dépend de plusieurs serveurs dans le centre de calcul. La personne chargée du dépannage commence par documenter soigneusement tous les symptômes connus sur les ordinateurs clients et les consoles de serveur. Comme l’origine du problème n’est pas immédiatement évidente, la personne chargée du dépannage commence la phase d’isolation du processus de dépannage. Quelle méthode la personne chargée du dépannage suit-elle ? Descendante Ascendante Diviser et conquérir Limiter l’étendue des causes probables ; la méthode n’est pas encore déterminée

17 Lisez l’exposé. Quels sont les trois renseignements qui peuvent être déterminés par l’analyse des informations affichées ? (Choisissez trois réponses.) Un signal de détection de la porteuse est présent. Des messages de test d’activité sont reçus avec succès. L’encapsulation par défaut est utilisée sur cette liaison série. La taille des paquets qui passent par cette interface ne peut pas être supérieure à 1 Ko. La fiabilité de cette liaison est très faible. La phase de négociation du protocole LCP est terminée.

18 Quels sont les deux composants qui doivent être pris en compte lors de l’établissement d’une ligne de base de réseau ? (Choisissez deux réponses.) Les informations relatives à la conception du réseau Les caractéristiques requises de la configuration du fournisseur de services L’attribution d’adresses IP sur le réseau Les performances attendues dans des conditions normales de fonctionnement Les performances attendues dans des conditions extrêmes de fonctionnement

19 Un administrateur réseau configure une liste de contrôle d’accès à appliquer uniquement aux utilisateurs sur le réseau 192.168.1.128 /26. Quelle combinaison de réseau et de masque générique ne correspond qu’aux adresses sur le réseau souhaité ? 192.168.1.0 0.0.0.63 192.168.1.0 0.0.0.192 192.168.1.128 0.0.0.63 192.168.1.128 0.0.0.192 192.168.1.128 0.0.0.255

20 Un technicien doit apporter plusieurs modifications à la configuration et à la topologie d’un réseau, puis déterminer le résultat de ces modifications. Quel est l’outil qui peut servir à déterminer l’effet global de ces modifications ? Un outil de planification initiale Une base de connaissances Un analyseur de protocole Un testeur de câble