CCNA4 Chapter 2 Exam - Online Assessment

1. Question

Which three are types of LCP frames used with PPP? (Choose three.)

link-negotiation frames
link-acknowledgment frames
link-maintenance frames
link-termination frames
link-control frames
link-establishment frames

2. Question

Which command can be used to view the cable type that is attached to a serial interface?

Router(config)# show interfaces
Router(config)# show controllers
Router(config)# show ip interface
Router(config)# show ip interface brief

3. Question

How does PPP interface with different network layer protocols?

by using separate NCPs
by negotiating with the network layer handler
by encoding the information field in the PPP frame
by specifying the protocol during link establishment through LCP

4. Question

Which address is used in the Address field of a PPP frame?

a single byte of binary 00000000
a single byte of binary 10101010
a single byte of binary 11111111
the IP address of the serial interface

5. Question

Which field marks the beginning and end of an HDLC frame?

Data
FCS
Control
Flag

6. Question

In which situation would the use of PAP be preferable to the use of CHAP?

when router resources are limited
when multilink PPP is used
when plain text passwords are needed to simulate login at the remote host
when a network administrator prefers it because of ease of configuration

7. Question

When configuring Multilink PPP, where is the IP address for the multilink bundle configured?

on a physical serial interface
on a subinterface
on a multilink interface
on a physical Ethernet interface

8. Question

Refer to the exhibit. Based on the debug command output that is shown, which statement is true of the operation of PPP.

CCNA4 v6.0 Chapter 2 Exam 003

CHAP authentication failed because of an unknown hostname.
A PPP session was successfully established.
Both PAP and CHAP authentication were attempted.
The debug output is from router R2.

9. Question

Refer to the exhibit. A network administrator is configuring the PPP link between the two routers. However, the PPP link cannot be established. Based on the partial output of the show running-config command, what is the cause of the problem?

CCNA4 v6.0 Chapter 2 Exam 002

The usernames do not match.
The passwords do not match.
The passwords should be longer than 8 characters.
The interface IP addresses are in different subnets.

10. Question

Which is an advantage of using PPP on a serial link instead of HDLC?

option for authentication
higher speed transmission
fixed-size frames
option for session establishment

11. Question

Which protocol will terminate the PPP link after the exchange of data is complete?

NCP
LCP
IPCP
IPXCP

12. Question

Which serial 0/0/0 interface state will be shown if no serial cable is attached to the router, but everything else has been correctly configured and turned on?

Serial 0/0/0 is up, line protocol is up
Serial 0/0/0 is up, line protocol is down
Serial 0/0/0 is down, line protocol is down
Serial 0/0/0 is up (looped)
Serial 0/0/0 is up (disabled)
Serial 0/0/0 is administratively down, line protocol is down

13. Question

How much total bandwidth is provided by a T1 line?

1.544 Mb/s
64 kb/s
128 b/s
43.736 Mb/s

14. Question

A network engineer is monitoring an essential, but poor quality, PPP WAN link that periodically shuts down. An examination of the interface configurations shows that the ppp quality 90 command has been issued. What action could the engineer take to reduce the frequency with which the link shuts down?

Issue the command ppp quality 70.
Issue the command ppp quality 100.
Set the DCE interface to a lower clock rate.
Use the bandwidth command to increase the bandwidth of the link.

15. Question

A network engineer is troubleshooting the loss of MPEG video viewing quality as MPEG video files cross a PPP WAN link. What could be causing this loss of quality?

PAP authentication was misconfigured on the link interfaces.
The clock rates configured on each serial interface do not match.
Link Quality Monitoring was not configured correctly on each interface.
The compress command was used when PPP was configured on the interfaces.

16. Question

Which PPP option can detect links that are in a looped-back condition?

Magic Number
MRU
Callback
ACCM

17. Question

A network engineer has issued the show interfaces serial 0/0/0 command on a router to examine the open NCPs on a PPP link to another router. The command output displays that the encapsulation is PPP and that the LCP is open. However, the IPV6CP NCP is not shown as open. What does the engineer need to configure to open the IPV6CP NCP on the link?

Configure CHAP authentication on each router.
Configure PPP multilink interfaces on each router.
Configure an IPv6 address on each interface on the link.
Issue the compress predictor command on each interface on the link.

18. Question

Which three physical layer interfaces support PPP? (Choose three.)

FastEthernet
GigabitEthernet
Ethernet
Ethernet
synchronous serial
HSSI

19. Question

What are three components of PPP? (Choose three.)

authorization
LCP
parallel communications
NCP
support for LAN and WAN
HDLC-like framing

20. Question

Refer to the exhibit. What type of Layer 2 encapsulation will be used for connection D on the basis of this configuration on a newly installed router:

RtrA(config)# interface serial0/0/0
RtrA(config-if)# ip address 128.107.0.2 255.255.255.252
RtrA(config-if)# no shutdown

CCNA4 v6.0 Chapter 2 Exam 001

Ethernet
Frame Relay
HDLC
PPP

21. Question

Which two statements describe a PPP connection between two Cisco routers? (Choose two.)

LCP tests the quality of the link.
LCP manages compression on the link.
Only a single NCP is allowed between the two routers.
NCP terminates the link when data exchange is complete.
With CHAP authentication, the routers exchange plain text passwords.

22. Question

Match the PPP options with the correct description. (Not all options are used.)

Sort elements

Increases the effective throughput on PPP connections by reducing the amount of data in the frame that must travel across the link.
Provides load balancing over the router interfaces.
The maximum size of the PPP frame.
Helps to ensure a reliable, loop-free data link layer.
The two choices are Password Authentication Protocol (PAP) and chanllenge Handshake Authentication Protocol (CHAP).

Compression
Multilink
Maximum Receive Unit
Authentication Protocol

23. Question

Match the phases of establishing a PPP session in the correct order. (Not all options are used.)

Sort elements

negotiate with the network layer to configure L3 protocol
verify authentication between NCP and the network layer protocol
establish the link and negotiate configuration options
determine the quality of the link

phase 3
phase 1
phase 2

24. Question

Match the steps to the PPP CHAP authentication process sequence. (Not all options are used.)

Sort elements

calculate the MD5 hash
calculate the ID and random number
send the challenge ID, hash, and username
use LCP to negotiate the type of authentication
negotiate the Layer 3 protocol
calculate the hash based on received information
compare the received hash with the calculated hash

Step 3
Step 2
Step 4
Step 1
Step 5
Step 6

25. Question

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
Why is the serial link between router R1 and router R2 not operational?

In each case the expected username is not the same as the remote router hostname.
The passwords are different in both routers.
The encapsulation in both routers does not match.
The authentication type is not the same in both routers.

CCNA4 Chapter 2 Exam – Online Assessment