ESAT Forouzan - Chapter 12: Point-to-Point Access (PPP)

Question 1

According to the PPP transition state diagram, exchange of user control and data packets occurs in the _____________ state.
a. Establishing
b. Authenticating
c. Networking
d. Terminating

Answer 1

c. Networking

Question 2

According to the PPP transition state diagram, options are negotiated in the _______ state.
a. Establishing
b. Authenticating
c. Networking
d. Terminating

Answer 2

a. Establishing

Question 3

According to the PPP transition state diagram, verification of user identification occurs in the _______state.
a. Establishing
b. Authenticating
c. Networking
d. Terminating

Answer 3

b. Authenticating

Question 4

According to the PPP transition state diagram, the link is disconnected in the __________ state.
a. Establishing
b. Authenticating
c. Networking
d. Terminating

Answer 4

d. Terminating

Question 5

In the PPP frame, the ________ field defines the contents of the data field.
a. Flag
b. Control
c. Protocol
d. FCS

Answer 5

c. Protocol

Question 6

In the PPP frame, the ________ field is similar to that of the U-frame in HDLC.
a. Flag
b. Control
c. Protocol
d. FCS

Answer 6

b. Control

Question 7

In the PPP frame, the _______ field has a value of 11111111 to indicate the broadcast address of HDLC.
a. Address
b. Control
c. Protocol
d. FCS

Answer 7

a. Address

Question 8

In the PPP frame, the ________ field is for error control.
a. Flag
b. Control
c. Protocol
d. FCS

Answer 8

d. FCS

Question 9

What is the purpose of LCP packets?
a. Configuration
b. Termination
c. Option negotiation
d. All of the above

Answer 9

d. All of the above

Question 10

___________ is a three-way handshake for user verification.
a. PPP
b. CHAP
c. PAP
d. (b) and (c)

Answer 10

b. CHAP

Question 11

A PAP packet and a CHAP packet can be distinguished by the value of the ________ field of the PPP frame.
a. Address
b. Control
c. Protocol
d. FCS

Answer 11

b. Control

Question 12

PAP requires __________ and ___________ from the user.
a. A password; a calculated value
b. Authentication identification; a password
c. A challenge value; a password
d. Authentication identification; a calculated value

Answer 12

b. Authentication identification; a password

Question 13

For CHAP authentication, the user takes the system’s ______ and its own _______to create a result that is then sent to the system.
a. Authentication identification; password
b. Password; challenge value
c. Password; authentication identification
d. Challenge value; password

Answer 13

d. Challenge value; password

Question 14

___________, an (a) __________ protocol, establishes and terminates a network layer connection for IP packets.
a. NCP; IPCP
b. CHAP; NCP
c. IPCP; NCP
d. SLIP; PPP

Answer 14

c. IPCP; NCP