CCNA 4 - WAN Technologies (V3.1)

CCNA 4 Final Exam Answers V3.1

1. An ISDN circuit from a branch office is remaining connected to the regional office. A network administrator determines a user has initiated a continuous ping from a desktop computer to the regional office. Which configuration change would allow the ISDN circuit to disconnect during any attempts to ping, while otherwise functioning properly?

change DDR from legacy to dialer profiles

remove the dialer list statement from the configuration

change the dialer list to exclude ICMP as interesting

disable inverse ARP



CCNA 4 Final Exam Answers V3.1 (1)
Refer to the exhibit. The link between the RTR-1 and RTR-2 routers is configured as shown in the exhibit. Although the show interfaces command shows the interface status as Serial0 is up, line protocol is up, IP traffic is not crossing this link. What is the problem?

The usernames are misconfigured.

The clock rate is configured on the wrong end of the link.

The IP addresses are not in the same subnet.

Interface serial 0/0 on RTR-1 must connect to interface serial 0/1 on RTR-2.

The passwords must be different for the CHAP authentication.

The clock rate must be 56000.

CCNA 4 Module 6 V3.1 Answers

CCNA 4 Module 6 V3.1 Answers

1. For which platform was UNIX first marketed commercially?

workstations and servers


network servers

large mainframe systems


2. How does RMON gather statistics on a segment?

analyzes traps on the segment

polls packets on the segment

analyzes every frame on the segment

analyzes source and destination addresses

CCNA 4 Module 5 V3.1 Answers

CCNA 4 Module 5 V3.1 Answers

1. How does Frame Relay technology process frames that contain errors? (Choose two.)

Frame Relay services depend on the upper layer protocols to handle error recovery.

It requires the receiving device to request that the sender retransmit erroneous frames.

FECN, BECN, and DE bits are set in the frames to minimize errors.

The receiving device drops any frames that contain errors without notifying the sender.

The frame relay switch notifies the sender that errors were detected.


2. Which statement identifies a reason for using point-to-point subinterfaces in Frame Relay networks?

Subinterfaces overcome routing update and split-horizon issues that occur with multipoint logical interfaces on a single physical interface.

A point-to-point subinterface does not require an IP address and therefore saves address space.

Point-to-point subinterfaces provide greater reliability and reachability in Frame Relay networks by requiring a mesh topology for network configurations.

Point-to-point subinterfaces increase the number of DLCIs that can be configured in a Frame Relay network.

CCNA 4 Module 4 V3.1 Answers

CCNA 4 Module 4 V3.1 Answers

1. Which of the following correctly describes ISDN BRI? (Choose three.)

two 64 kbps B channels and one 16 kbps D channel

B channel is suitable for voice data

uses in-band signaling

uses out-of-band signaling

offers the equivalent of a T1/E1 connection

twenty-three 64 kbps B channels and one 16 kbps D channel


2. Which of the following is considered out-of-band signaling?

using a frequency outside of the rated bandwidth for transmission

transmitting data over a control channel

using a separate channel for control signals

transmitting control signals over a data channel

CCNA 4 Module 3 V3.1 Answers

CCNA 4 Module 3 V3.1 Answers

1. A technician is testing the functionality of a recently installed router. The technician is unable to ping the serial interface of a remote router. The technician executes the show interface serial 0/0 command on the local router and receives the following output:
Serial0/0 is up, line protocol is down(disabled)
What are possible causes for this command output? (Choose two.)

interface missing the no shutdown command

clockrate command missing

CSU/DSU failed

interface shutdown due to high error rate

cable missing


2. A technician has used Telnet to gain remote access to a router that has no connectivity on its serial interface. Which command should be issued to determine if the serial cable is connected properly?

show controllers

show processes

show run

show status

CCNA 4 Module 2 V3.1 Answers

1. Which of the following is commonly used as Data Terminal Equipment?






2. Which term describes the cabling that connects the customer site to the nearest exchange of the WAN service provider?



local loop



CCNA 4 Module 1 V3.1 Answers


CCNA 4 Module 1 V3.1 Answers (1)
Which of the following can be done to allow the users on the network to communicate with the Web Server shown in the graphic? (Choose two.)

Configure the Miami router to use NAT.

Configure the Web Server with a private address.

Configure the Miami router to use PAT.

Change the Internet link IP address of to a private address.

Configure the Tampa router to use PAT.


2. What is the default number of pings issued by a DHCP server to a pool address before sending the DHCPOFFER to a client?