Computer Networks Tutorial 1

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

• Logical link control sublayer

• Media access control sublayer

• Network interface control sublayer

• Frame Control Sublayer

For the bit sequence 1011101011, draw the waveform for the following encoding techniques:

i) NRZ – L ii) Differential Manchester

Given the data word 1011001110 and the divisor 10011, explain how error detection and validation can be carried out?

____________ is a form of spreading in which the center frequency of a conventional carrier is altered many times within a fixed time period.

• Time Hopping (TH)

• Direct Sequence (DS)

• Frequency Hopping (FH)

• Chrip

State whether the following statements about checksum are True or False.

i. The checksum segment is sent along with the data segments.
ii. It can not detect any errors involving an even number of bits.

• i-True, ii-False

• i-True, ii-True

• i-False, ii-True

• i-False, ii-False

______________ is an error detection method in which a receiver can detect all single-bit errors in each codeword.

• Parity check

• Cyclic redundancy check

• Hamming code

• Redundancy check