Rajasthan Polytechnic Third Year Paper 2016 – Computer Communication

Rajasthan Polytechnic Third Year Paper 2016 – Computer Communication

Which of the following is NOT the possible ways of data exchange?
(a) Simplex
(b) Multiplex
(c) Half-duplex
(d) Full-duplex

For error detection __________is used by the higher layer protocols (TCP/IP)
(a) Bit-sum
(b) Error-bit
(c) Check-sum
(d) Data-sum

A repeater operates in which layer of OSI model?
(a) Physical layer
(b) Transport layer
(c) Network layer
(d) Data Link layer

What is the advantage of the computr networking?
(a) File sharing
(b) Easier access to resources
(c) Easier backups
(d) All of the aobve

MAC address is the example of
(a) Transport layer
(b) Application layer
(c) Data Link layer
(d) Physical layer

Which of the following is NOT a networking device?
(a) HUB
(b) Switch
(c) Router
(d) Linux

What does protocol defines?
(a) Protocol defines how data is communicated
(b) Protocol defines when data is communicated
(c) Protocol defines what data is communicated
(d) All of the above

________cable can carry signals of higher frequency ranges than ________cable.
(a) Twisted pair, fiber-optic
(b) Coaxial, fiber-optic
(c) Coaxial, twisted pair
(d) None of the above

Basic funciton of a MODEM is
(a) to modulate a signal (digital to analog)
(b) to demodulate a signal (analog to digital)
(c) both modulate & demodulate a signal
(d) None of these

In 1-persistent CSMA
(a) station transmits if channel is idle
(b) station transmits after a random amount of time, if channel is idle
(c) Transmits when channel is busy
(d) Station transmits with probability P, if channel is idle

Which one of the following is NOT an example of unguided medium?
(a) Tropospheric communication link
(b) Satellite communication link
(c) Optical fiber communication link
(d) Troposcatter communication link

Error detection at the data link level is achieved by
(a) Bit stuffing
(b) Cyclic redundancy check
(c) Hamming code
(d) Equalization

Start & Stop bits are used in serial communication for
(a) Error detection
(b) Synchronization
(c) Error correction
(d) Slowing down the communication

The topology with highest reliability is
(a) Mesh topology
(b) Ring topology
(c) Star topology
(d) Bus topology

Which one of the following task is NOT done by data link layer?
(a) Framing
(b) Flow control
(c) Channel coding
(d) Error control