WAN Q2

Which three (3) statements decribe the functions of time-division multiplexing. (Choose three)

A) Bit interleaving controls the timing mechanism that places data on the channel.
B) Priority can be delicated to one data source.
C) Time slots are utilized based on a first-come-first-served basis
D) Sources of data alternate during transmission and are reconstructed at the receiving end.
E) Statistical time-division multiplexing (STDM) was developed to overcome the inefficiency caused by time slots still being allocated, even when the channel has no data to transmit.
F) Multiple data stream share one common channel.

What is the default encapsulation for serial interfaces on a Cisco router?

A) PPP
B) Frame Relay
C) HDLC
D) X.25

Place the PPP establishment steps in the correct order.

Send link-establishment frames
Send configuration-acknowledgement frames
Test link quality (optional)  
Negotiate Network protocol options
Link goes into Open state

What is the function of the protocol field in a PPP frame?

A) It identifies the application layer protocol that will process the frame.
B) It provides connectionless link service that does not require establishment of data links or link stations.
C) It identifies the protocol encapsulated in the data field of the frame.
D) It identifies the transport layer protocol that will process the frame.

Match the LCP options configuration terms with the associated description.

LCP Options:
stacker/predictor 
multilink 
CHAP/PAP  
Link Quality

Descriptions:
compression protocol  
allow load balancing
authentication protocol
Monitoring error control

If an authentication protocol is configured for PPP operation, when is the remote peer authenticated?

A) prior to link establishment 
B) before NCP configuration process begins
C) after NCP configuration process ends
D) during link establishment

Why are Network Control Protocols (NCP) used in PPP?

A) to manage network congestion and to allow quality testing of the link
B) to provide authentication capabilities to PPP
C) to allow multiple Layer 3 protocols to operate over the same physical link
D) to establish and terminate data links

Which statement describes the PAP authentication protocol?

A) It requires the same username to be configured on both the peer routers
B) It uses a two-way handshake to establish identity
C) It sends encrypted passwords by default
D) It protects against repeated trial-and-error attacks

The network administrator is configuring Router1 to connect to Router2 using a three-way handshake authentication. Router2 is connected to Router1's serial 0/1/0 interface. Match the command necessary to configure Router1 to the appropriate description.

Description:
configure the username and password 
enter interface configuration mode
specify the encapsulation type
configure authentication 

Commands:
username Router2 password dcpe
username Router1 password dcpe
interface serial 0/1/0
interface serial 0/0/0
encapsulation ppp
encapsulation hdlc
ppp authentication chap
ppp authentication pap

What is required to succesfully establish a connection between two routers using CHAP authentication?

A) The usernames of both routers must be the same.
B) The ppp chap sent-username command must be configured the same on both routers.
C) The hostname of both routers must be the same.
D) The password configured with the username of the router must be the same on both routers.
E) The enable secret passwords of both routers must be the same.