Data Communication and Networking – ATM MCQs

This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “ATM ”.
 

1
. A transmission path may have _______ virtual path(s).
  • no
  • exactly one
  • exactly two
  • several
2
. A virtual connection is identified by _______.
  • a TPI and a VCI
  • a VCI and a VPI
  • a TPI and a VPI
  • 2 VPIs
3
. In a virtual connection identifier, the VCI is _______ bits in an UNI and _______ bits in an NNI
  • 8; 16
  • 16; 8
  • 8; 8
  • 16; 16
4
. In a virtual connection identifier, the VPI is _______ bits in an UNI and _______ bits in an NNI.
  • 8; 12
  • 12; 8
  • 8; 8
  • 12; 12
5
. What are the two types of ATM switches?
  • PVC and SVC
  • VPI and VCI
  • VP and VPC
  • PVC and SUV
6
. In a _______ switch, the VCI doesn't change but the VPI does.
  • VPC
  • VPI
  • PVC
  • VP
7
. In a _______ switch both the VCI and VPI change.
  • VPC
  • VP
  • PVC
  • SVC
8
. A non-boundary ATM switch usually uses _______ for routing.
  • VPIs
  • VPIs and VCIs
  • VCIs
  • VCRs
9
. An ATM switch at the boundary of the network usually uses _______ for routing.
  • VPIs
  • VPIs and VCIs
  • VCIs
  • VCRs
10
. The simplest ATM switch is the _______ switch.
  • crossbar
  • knockout
  • banyan
  • Batcher-banyan
11
. The _______ switch is basically a crossbar switch with distributors and queues to handle collisions.
  • knockout
  • banyan
  • Batcher
  • Batcher-banyan
12
. A banyan switch with 32 inputs and 32 outputs has _______ microswitches at each stage.
  • 4
  • 5
  • 8
  • 16
13
. A banyan switch with 32 inputs and 32 outputs has _______ stages.
  • 4
  • 5
  • 8
  • 16
14
. A collision can occur in a _______ multistage switch even if the two cells do not have the same output port destination
  • crossbar
  • knockout
  • banyan
  • Batcher-banyan
15
. ATM is a cell relay protocol that _______.
  • has moved software functions to hardware
  • is connection-oriented
  • can interface with existing systems
  • all of the above
16
. What is the main problem in multiplexing packets of different sizes?
  • Smaller packets are always transmitted first.
  • Larger packets are always transmitted first.
  • Smaller packets may experience delayed transmission.
  • Packets are transmitted according to size.
17
. Which of the following best describes a cell network?
  • All packets carry audio or video data.
  • All packets are the same size.
  • The packet size is variable, but less than 4096 bytes.
  • all of the above
18
. In a cell network, cells belonging to a single message _______.
  • may follow different paths
  • may arrive out of order
  • require extensive additional addressing and control information
  • follow the same path
19
. Each ATM _______ contains a table to identify paths to other switches
  • cell
  • switch
  • station
  • a and b
20
. The VPI identifies a _______.
  • cell
  • station
  • virtual path
  • virtual packet
21
. A cell's header has a _______ field.
  • VPI
  • VCI
  • port
  • a and b
22
. As a cell arrives at a VP switch, _______ change(s).
  • only its VPI
  • only the port
  • both its VPI and the port
  • the segment number
23
. The _______ is needed for switches handling traffic for multiple channels on each path.
  • VPI
  • VCI
  • port number
  • ATM
24
. An ATM cell consists of _______ bytes.
  • 48
  • 53
  • 256
  • a variable number of
25
. The _______ layer accepts transmissions from upper-layer services.
  • AAL
  • ATM
  • physical
  • SAR
26
. The _______ layer adds a 5-byte header to a 48-byte segment.
  • AAL
  • ATM
  • physical
  • SAR
27
. The physical layer is responsible for ________.
  • defining the transmission medium
  • bit transmission
  • encoding
  • all of the above
28
. A transmission path can be divided into several _______
  • TPs
  • VPs
  • VCs
  • all of the above
29
. All cells belonging to a single message follow the same _______.
  • TP
  • VP
  • VC
  • none of the above
30
. A virtual path may have _______ virtual circuit(s).
  • no
  • exactly one
  • exactly two
  • several

 
 
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