Deck 4: Data Link and Network

Question 1

_______codes are special linear block codes with one extra property. If a codeword is rotated, the result is another codeword.

A)Non-linear
B)Convolution
C)Cyclic
D)none of the above

Answer 1

Cyclic

Question 2

The _____of errors is more difficult than the ______.

A)correction; detection
B)detection; correction
C)creation; correction
D)creation; detection

Answer 2

correction; detection

Question 3

In modulo-11 arithmetic, we use only the integers in the range ______, inclusive.

A)1 to 10
B)1 to 11
C)0 to 10
D)none of the above

Answer 3

0 to 10

Question 4

In modulo-2 arithmetic, we use only ______.

A)1 and 2
B)0 and 2
C)0 and 1
D)none of the above

Question 5

Adding 1 and 1 in modulo-2 arithmetic results in _________.

A)1
B)2
C)0
D)none of the above

Question 6

Which one of the following task is not done by data link layer?

A)framing
B)error control
C)flow control
D)channel coding

Question 7

Which sublayer of the data link layer performs data link functions that depend upon the type of medium?

A)logical link control sublayer
B)media access control sublayer
C)network interface control sublayer
D)none of the above

Question 8

Header of a frame generally contains

A)synchronization bytes
B)addresses
C)frame identifier
D)all of the above

Question 9

When 2 or more bits in a data unit has been changed during the transmission, the error is called

A)random error
B)burst error
C)inverted error
D)none

Question 10

CRC stands for

A)cyclic redundancy check
B)code repeat check
C)code redundancy check
D)cyclic repeat check

Question 11

Which one of the following is a data link protocol?

A)Ethernet
B)point to point protocol
C)HDLC
D)all of the above

Question 12

The technique of temporarily delaying outgoing acknowledgements so that they can be hooked onto the next outgoing data frame is called

A)piggybacking
B)cyclic redundancy check
C)fletcher's checksum
D)none of the mentioned

Question 13

The data link layer takes the packets from _____ and encapsulates them into frames for transmission.

A)network layer
B)physical layer
C)transport layer
D)application layer

Question 14

The maximum size of payload field in Ethernet frame is

A)1000 bytes
B)1200 bytes
C)1300 bytes
D)1500 bytes

Question 15

What is inter-frame gap?

A)idle time between frames
B)idle time between frame bits
C)idle time between packets
D)none of the above

Question 16

Error detection at the data link level is achieved by

A)Bit Stuffing
B)Cyclic Redundancy Code
C)Hamming Code
D)Equalization

Question 17

"BAUD" rate means

A)The number of bits transmitted per unit time.
B)The number of bytes transmitted per unit time.
C)The rate at which the signal changes.
D)None of the above

Question 18

Start and stop bits are used in serial communication for

A)Error detection
B)Error correction
C)Synchronization
D)Slowing down the communication

Question 19

Unmodulated signal coming from a transmitter is know as

A)Carrier signal
B)Baseband signal
C)Primary signal
D)None of these

Question 20

Maximum data rate of a channel for a noiseless 3-kHz binary channel is

A)3000bps
B)6000 bps
C)1500 bps
D)None of these

Question 21

The ________ measures the number of lost or garbled messages as a fraction of the total sent in the sampling period.

A)Residual Error Rate.
B)Transfer Failure Probability.
C)Connection release failure probability.
D)Connection establish.

Question 22

In session layer, during data transfer, the data stream responsible for the "control" purpose (i.e control of the session layer itself) is

A)Regular Data
B)Typed data
C)Capability Data
D)Expedited Data

Question 23

Which of the following is not a field in the Ethernet Message packet?

A)Type
B)Data
C)Pin-code
D)Address

Question 24

The Network topology that supports bi-directional links between each possible node is

A)Ring
B)Star
C)Tree
D)Mesh

Question 25

Which network has connectivity range up to 10 meters?

A)LAN
B)PAN
C)MAN
D)WAN