This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “ATM ”.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. A transmission path may have _______ virtual path(s).
- no
- exactly one
- exactly two
- several
D. 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
B. a VCI and a VPI
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
D. 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
A. 8; 12
5. What are the two types of ATM switches?
- PVC and SVC
- VPI and VCI
- VP and VPC
- PVC and SUV
C. VP and VPC
6. In a _______ switch, the VCI doesn't change but the VPI does.
- VPC
- VPI
- PVC
- VP
D. VP
7. In a _______ switch both the VCI and VPI change.
- VPC
- VP
- PVC
- SVC
A. VPC
8. A non-boundary ATM switch usually uses _______ for routing.
- VPIs
- VPIs and VCIs
- VCIs
- VCRs
A. VPIs
9. An ATM switch at the boundary of the network usually uses _______ for routing.
- VPIs
- VPIs and VCIs
- VCIs
- VCRs
B. VPIs and VCIs
10. The simplest ATM switch is the _______ switch.
- crossbar
- knockout
- banyan
- Batcher-banyan
A. crossbar
11. The _______ switch is basically a crossbar switch with distributors and queues to handle collisions.
- knockout
- banyan
- Batcher
- Batcher-banyan
A. knockout
12. A banyan switch with 32 inputs and 32 outputs has _______ microswitches at each stage.
- 4
- 5
- 8
- 16
D. 16
13. A banyan switch with 32 inputs and 32 outputs has _______ stages.
- 4
- 5
- 8
- 16
B. 5
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
C. 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
D. 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.
C. Smaller packets may experience delayed transmission.
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
B. All packets are the same size.
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
D. follow the same path
19. Each ATM _______ contains a table to identify paths to other switches
- cell
- switch
- station
- a and b
B. switch
20. The VPI identifies a _______.
- cell
- station
- virtual path
- virtual packet
C. virtual path
21. A cell's header has a _______ field.
- VPI
- VCI
- port
- a and b
D. 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
C. both its VPI and the port
23. The _______ is needed for switches handling traffic for multiple channels on each path.
- VPI
- VCI
- port number
- ATM
B. VCI
24. An ATM cell consists of _______ bytes.
- 48
- 53
- 256
- a variable number of
B. 53
25. The _______ layer accepts transmissions from upper-layer services.
- AAL
- ATM
- physical
- SAR
A. AAL
26. The _______ layer adds a 5-byte header to a 48-byte segment.
- AAL
- ATM
- physical
- SAR
B. ATM
27. The physical layer is responsible for ________.
- defining the transmission medium
- bit transmission
- encoding
- all of the above
D. all of the above
28. A transmission path can be divided into several _______
- TPs
- VPs
- VCs
- all of the above
B. VPs
29. All cells belonging to a single message follow the same _______.
- TP
- VP
- VC
- none of the above
C. VC
30. A virtual path may have _______ virtual circuit(s).
- no
- exactly one
- exactly two
- several
D. several
