CS601 Solved Final Term MCQ's

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Poll/Select is a technique related with

	►	line control
	►	line discipline
	►	error control

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Router work on ► data link layer ► physical layer ► network layer

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A Null modem is a ► traditional modem ► technique to connect two DTE ► both

WDM(wave division multiplexing) deals with

	►	electric waves
	►	light waves
	►	both

Set of rules governing communication is known as

	►	OSI model
	►	Protocol
	►	Medium

Burst error is easily corrected then bit error.

	►	TRUE
	►	FALSE

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Unipolar use one voltage levels.

	►	TRUE
	►	FALSE

TCP/IP application layers combine the functions of OSI Application, Session and Transport layers.

	►	TRUE
	►	FALSE

OSI standard is practically implemented in the form of internet.

		►	TRUE
		►	FALSE
In fiber optics, the signal source is __________ waves. light radio infrared very low frequency

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Wave division multiplexing (WDM) is conceptually the same as FDM, except that the multiplexing and demultiplexing involve _________ signals. analog light digital periodic
Local loop is a connection between _______________ and ______________. Subscriber’s handset and exchange exchange and T-Lines exchange and E-Lines None of the above
In vertical redundancy check (VRC) a __________ bit is added to every data unit. synchronization framing parity interleaving
In cyclic redundancy checking, what is CRC? The divisor The remainder The quotient
Which error detection method involves polynomials? CRC VRC LRC Checksum
In stop and wait ARQ, if “data 1” has an error, the receiver sends a ________ frame. NAK NAK 0 NAK 1 http://www.allvupastpapers.blogspot.com/  NAK 2
Poll/Select line discipline requires _____________ to identify the packet recipient. an address a timer a buffer a dedicated line

Which of the following best describes a single-bit error?

1 A single bit is inverted

2 A single bit is inverted per transmission

3 A single bit is inverted per data unit

4 Any of the above

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In fiber optic cable, the signal source is__________ waves

1 Infrared

2 Light

3 Radio

4 Very Low Frequency

In an environment with many high-voltage devices, the best transmission medium

would be _________.

1 Atmosphere

2 Coaxial Cable

3 Twisted Pair

4 Fiber Optic Cable

Which of the following is not a guided medium?

1 Twisted Pair

2 Fiber Optic Cable

3 Coaxial Cable

Which multiplexing technique involves signals composed of light beams?

1 TDM

2 FDM

3 WDM

4 None of the above

The _______ layer changes bits into electromagnetic signals.

1 Network

2 Application

3 Physical

4 Presentation

Flow Control is needed to prevent ____________

1 Overflow of sender buffer

2 Overflow of the receiver buffer

3 Bit Errors

4 Collision between sender and receiver

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By ADEEL ABBAS, Bhakkar. AdeelAbbasbk@gmail.com