The GATE Grind

GATE 2018 CS – Question 23

Computer Networks · Basics of Switching and Performance Metrics · 1 mark · Multiple choice

Match the following:

FieldLength in bits
P. UDP Header's Port NumberI. 48
Q. Ethernet MAC AddressII. 8
R. IPv6 Next HeaderIII. 32
S. TCP Header's Sequence NumberIV. 16
  1. P-III, Q-IV, R-II, S-I
  2. P-II, Q-I, R-IV, S-III
  3. P-IV, Q-I, R-II, S-III
  4. P-IV, Q-I, R-III, S-II

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Correct answer: (C) P-IV, Q-I, R-II, S-III

Explanation

A UDP port number is 16 bits, an Ethernet MAC address is 48 bits, the IPv6 next-header field is 8 bits, and the TCP sequence number is 32 bits.