This Portion of Data Communication and Networking contains more frequently asked MCQs (Multiple Choice Questions and Answers) / Objective Type Questions and Answers in the various Competitive Examinations.
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1
. Which of the following divides the high speed signal into frequency bands?
- T switch
- Time division multiplexer
- Frequency Division Multiplexer
- Code Division Multiplexer
2
. Sending a file from users personal computers, primary memory or disk to another computer is called
- uploading
- hang on.
- logging on
- downloading
3
. In OSI network architecture the dialogue control and token management are responsibilities of
________
- session layer
- network layer
- transport layer
- data link layer
4
. Which one of the following is not a function of network layer?
- routing
- inter-networking
- congestion control
- none of the above
5
. The interactive transmission of data within a time sharing system may be best suited to __________
- half duplex
- simplex lines
- biflex lines
- full duplex lines
6
. How many OSI layers are covered in the X.25 standard?
- 3
- 2
- 7
- 6
7
. The third layer of OSI model is _____
- physical layer.
- data link layer
- network layer
- transport layer.
8
. The X.25 standard specifies a _________
- technique for start stop data
- technique for dial access
- DTE/DCE interface
- data bit rate
9
. Which of the following signals is not standard RS-232-C signal?
- VDR
- CTS
- RTS
- DSR
10
. What is the minimum number of wires needed to send data over a serial communication link layer?
- 1
- 2
- 4
- 6
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