4-3: Point-to-Point Flashcards Preview

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Flashcards in 4-3: Point-to-Point Deck (36):
1

How does PPP interface with different network layer protocols?

By using separate NCPs

1

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

Layer 1

2

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

LCP

3

Cisco uses what as the default encapsulation?

HDLC

4

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

2 or 4

4

PAP is very vulnerable to what type of attacks?

Trial-and-error

6

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

variable

6

PPP Link Establishment fails when the receiver sends?

confNAK & confReject

7

PPP words on any ___________ or ___________ line including HSSI.

Synchronous, Asynchronous

8

CHAP Authentication is a _____-way handshake.

Three

8

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

On a multilink interface

9

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

Magic Number

10

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

PAP

11

Serial connections sends data at ___ data bit at a time

1

12

PPP Link Establishment completed when the receiver sends?

confACK

12

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

True

14

What are the two authentication methods supported by PPP?

PAP and CHAP

14

What is the first phase of establishing a PPP session?

Establish the link and negotiate configuration options

16

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

PPP

17

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

Time Division Multiplexing

18

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

False, CHAP uses a periodic authentication challange

19

What is the third phase of establishing a PPP session?

Negotiate with the network layer to configure layer 3 protocol

21

Which PPP authentication method is preferred?

CHAP

23

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

1

26

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

option for authentication

27

PPP uses what two methods of compression?

Stacker and Prefictor

28

What is the second phase of establishing a PPP session?

Determine the quality of the link

29

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

Flag

30

What are the tree key standards for serial connections?

RS-232, V.35, HSSI

31

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

The device hostname

31

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

A single byte of binary 11111111

32

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

show controllers [interface-name]

33

The PPP address field is what?

1111 1111 (8 ones)

34

PAP Authentication is a ___-way handshake.

Two

35

What two factors affect parallel communication?

Clock Skew & Crosstalk

36

HDLC supports CDP, but not what other key feature?

Authentication