Computer networks - datalink layer design issues

The main process of datalink layer is _____?

• Correcting errors

• Transmit the data

• Only detect the errors

• None

The __________ service consists of having the source machine send independent frames to the destination machine without having the destination machine acknowledge them and No logical connection is established beforehand or released afterward.

• Unacknowledged connectionless service

• Acknowledged Connection oriented service

• None

_________ method use a field in the header to specify the number of characters in the frame.

• Flag bytes with byte stuffing

• Character count

• Starting and ending flags, with bit stuffing

• Physical layer coding violations

Redundancy bits are called as ______?

• Parity bits

• Bytes

• Flags

• None

If the data but contains odd number of 1's then the parity bit will set to ____?

• 1

• 0

• None

• Data bit

What is the check sum bit value of the following data frame?

10011001 11100010(total blocks k=2)

• 10000011

• 01111100

• 1000001111

• 110011001

CRC stands for _______?

• Cycle redundancy check

• Cycle repetitive check

• Cyclic redundancy check

• Cyclic repetitive check

Data bit : 10001101 contains ______?

• Odd parity

• Even parity

Which formula is used to categorise the parity bit in Hamming codes?

• 2ⁿ

• 2*n+1

• 2_n

• n²

True or false?

In check sum one need to add the carry to the sum

• True

• False