4-3: Point-to-Point

Question 1

How does PPP interface with different network layer protocols?

Answer 1

By using separate NCPs

Question 1

At which layer of the OSI model does multiplexing take place?

Answer 1

Layer 1

Question 2

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

Answer 2

LCP

Question 3

Cisco uses what as the default encapsulation?

Answer 3

HDLC

Question 4

The FCS field in a PPP frame is how many bit(s)?

Answer 4

2 or 4

Question 4

PAP is very vulnerable to what type of attacks?

Answer 4

Trial-and-error

Question 6

STDM uses a ________ time slot allowing channels to compete for free space

Answer 6

variable

Question 6

PPP Link Establishment fails when the receiver sends?

Answer 6

confNAK & confReject

Question 7

PPP words on any ___________ or ___________ line including HSSI.

Answer 7

Synchronous, Asynchronous

Question 8

CHAP Authentication is a _____-way handshake.

Answer 8

Three

Question 8

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

Answer 8

On a multilink interface

Question 9

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

Answer 9

Magic Number

Question 10

What PPP authentication method is necessary to login on older systems?

Answer 10

PAP

Question 11

Serial connections sends data at ___ data bit at a time

Answer 11

1

Question 12

PPP Link Establishment completed when the receiver sends?

Answer 12

confACK

Question 12

True / False: You can use both PPP authentication methods at the same time?

Answer 12

True

Question 14

What are the two authentication methods supported by PPP?

Answer 14

PAP and CHAP

Question 14

What is the first phase of establishing a PPP session?

Answer 14

Establish the link and negotiate configuration options

Question 16

If you are connecting to a non-Cisco device, you must use what encapsulation?

Answer 16

PPP

Question 17

Which layer 1 sharing mechanism is used for two or more channels with one slot per channel?

Answer 17

Time Division Multiplexing

Question 18

True / False: Once CHAP has successfully authenticated, the authentication process is completed.

Answer 18

False, CHAP uses a periodic authentication challange

Question 19

What is the third phase of establishing a PPP session?

Answer 19

Negotiate with the network layer to configure layer 3 protocol

Question 21

Which PPP authentication method is preferred?

Answer 21

CHAP

Question 23

The Flags field in a PPP frame are how many bit(s)?

Answer 23

1

Question 26

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

Answer 26

option for authentication

Question 27

PPP uses what two methods of compression?

Answer 27

Stacker and Prefictor

Question 28

What is the second phase of establishing a PPP session?

Answer 28

Determine the quality of the link

Question 29

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

Answer 29

Flag

Question 30

What are the tree key standards for serial connections?

Answer 30

RS-232, V.35, HSSI

Question 31

CHAP does not use a username, is uses what instead?

Answer 31

The device hostname

Question 31

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

Answer 31

A single byte of binary 11111111

Question 32

What command would you use to indicate if a DCE or DTE cable is attached?

Answer 32

show controllers [interface-name]

Question 33

The PPP address field is what?

Answer 33

1111 1111 (8 ones)

Question 34

PAP Authentication is a ___-way handshake.

Answer 34

Two

Question 35

What two factors affect parallel communication?

Answer 35

Clock Skew & Crosstalk

Question 36

HDLC supports CDP, but not what other key feature?

Answer 36

Authentication