GATE CSE Data Link Layer – Computer Networks Practice Test

GATE CSE Data Link Layer – Computer Networks Practice Test | Set 1

Questions 76-80 of 100

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Question 76

MSQ · Multiple Correct 2 mark

Which of the following functions belong to the DATA LINK LAYER (Layer 2)?

A Flow Control (Sliding Window) B IP Routing across subnets C Framing and bit/byte stuffing D Error Control (CRC / Retransmission)

Question 77

MSQ · Multiple Correct 2 mark

Which statements about Go-Back-N ARQ are correct?

A The receiver window is typically 1. B The receiver normally buffers arbitrary out-of-order frames for later delivery. C A timeout can cause retransmission of the timed-out frame and later unacknowledged frames. D The sender may have multiple unacknowledged frames in flight.

Question 78

MSQ · Multiple Correct 2 mark

Which statements about Selective Repeat ARQ are correct?

A The receiver can buffer correctly received out-of-order frames. B The sender and receiver windows are normally constrained to avoid sequence-number ambiguity. C Individual frames can be retransmitted. D The receiver must discard every out-of-order frame.

Question 79

MSQ · Multiple Correct 2 mark

Which statements about CRC are correct?

A CRC uses modulo-2 arithmetic. B The transmitted CRC remainder is generated by polynomial division. C CRC guarantees correction of every detected error. D A degree-r generator produces an r-bit remainder.

Question 80

MSQ · Multiple Correct 2 mark

Which statements about standard Ethernet frame fields are correct?

A The source MAC address is 6 bytes. B The standard MAC payload maximum is 1500 bytes. C The FCS is 4 bytes. D The destination MAC address is 6 bytes.