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10 Cards in this Set

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Which output from the show interfaces s0/0/0 command indicates that the far end of a point-to-point link has a different encapsulation set than the local router?

Serial 0/0/0 is up, line protocol is down.

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

HDLC

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

It identifies the network layer protocol encapsulated in the frame’s Data field

Which of the following statements describe the function of statistical time-division multiplexing (STDM)? (Choose three.)

-Multiple data streams share one common channel.


-STDM was developed to overcome the inefficiency caused by time slots still being allocated even when the channel has no data to transmit.

Which of the following describes the serial connection between two routers using the High-level Data Link Control (HDLC) protocol?

Synchronous bit-oriented transmissions using a frame format that allows flow control and error detection

If an authentication protocol is configured for PPP operation, when is the client or user workstation authenticated?

If an authentication protocol is configured for PPP operation, when is the client or user workstation authenticated?

Why are Network Control Protocols used in PPP?

To allow multiple Layer 3 protocols to operate over the same physical link

Which statement describes the PAP authentication protocol?

It uses a two-way handshake to establish identity.

11) A technician testing the functionality of a recently installed router is unable to ping the serial interface of a remote router. The technician executes the show interfaces serial 0/0/0 command on the local router and sees the following line in the router:




Serial0/0/0 is down, line protocol is down




What are two possible causes of this command output?

-The carrier detect signal is not sensed.


-The cabling is faulty or incorrect.

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

The password configured with the router’s username must be the same on both routers.