Data Communication and Networking – Integrated Services Digital Network (ISDN) MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Integrated Services Digital Network (ISDN) ”.
 

1
. The part of the address field in an LAPD frame that defines the upper-layer service is called ________.
  • TEI
  • SAPI
  • CR
  • none of the above
2
. The part of the address field in an LAPD frame that uniquely defines a TE is called ________.
  • TEI
  • SAPI
  • CR
  • none of the above
3
. Which of the following (in decimal) is not a valid SAPI?
  • 56
  • 42
  • 64
  • 63
4
. When an LAPD frame uses the D channel for signaling, the value of SAPI (in decimal) is ______________.
  • 0
  • 63
  • 64
  • 1
5
. When an LAPD frame uses the D channel for data transmission, the value of SAPI (in decimal) is ______________.
  • 0
  • 63
  • 64
  • 16
6
. When an LAPD frame uses management data, the value of SAPI (in decimal) is _________
  • 0
  • 63
  • 16
  • 1
7
. Which of the following (in decimal) is not a valid TEI?
  • 56
  • 128
  • 64
  • 63
8
. The TEI can define up to _________ TEs.
  • 8
  • 128
  • 64
  • 32
9
. The value of an LAPD address is 00000000 11111111. This is a _________ frame.
  • command
  • response
  • a or b
  • neither a nor b
10
. The value of an LAPD address is 00000000 00010001. The frame is destined for a TE with address _________.
  • 4
  • 6
  • 8
  • none of the above
11
. The network layer of the D channel is defined by the _______ protocol
  • Q.931
  • I.430
  • I.431
  • neither a nor b
12
. When a user dials a number, which of the following messages is sent by the D channel to the network?
  • setup
  • connect
  • progress
  • none of the above
13
. To initiate a call, which of the following messages is sent by the D channel?
  • setup
  • connect
  • progress
  • none of the above
14
. Acceptance of a call requires a _______ message in an LAPD frame.
  • setup
  • connect
  • progress
  • none of the above
15
. Which message is sent by the D channel to show that call establishment is in progress?
  • setup
  • connect
  • progress
  • none of the above
16
. To re-establish a suspended call, a user sends a ___________ message.
  • setup
  • resume
  • progress
  • none of the above
17
. An ISDN address is ___________ digits long.
  • 10
  • 40
  • 55
  • none of the above
18
. An ISDN address uses _______ decimal digits to define a country code.
  • 3
  • 2
  • 10
  • none of the above
19
. An ISDN address can define up to _________ countries.
  • 10
  • 100
  • 1000
  • none of the above
20
. An ISDN address uses _______ decimal digits to define a network inside a country.
  • 3
  • 2
  • 9
  • none of the above
21
. An ISDN address can define up to _________ networks inside a country
  • 10
  • 100
  • 1000
  • none of the above
22
. An ISDN address uses _______ decimal digits to define a subscriber.
  • 3
  • 9
  • 10
  • none of the above
23
. An ISDN address can define up to _________ subscribers.
  • 106
  • 109
  • 1010
  • none of the above
24
. An ISDN address uses _______ decimal digits to define a subaddress.
  • 30
  • 40
  • 20
  • none of the above
25
. An ISDN address can define up to _________ subaddresses.
  • 106
  • 109
  • 1010
  • none of the above

 
 
You may be interested in:
Data Communication and Networking MCQs by Behrouz A Forouzan.
Computer Networking MCQs
Fundamental of Networking Online Tests
Data Communication and Networking Online Tests
Data Communication and Networking Short Questions Answers
Data Communication and Networking Tutorials and Study Notes