The GATE Grind

GATE 2025 CS (CS2) – Question 16

Computer Networks · TCP: Flow Control, Congestion Control, Socket API · 1 mark · Multiple choice

Consider the following statements:

(i) Address Resolution Protocol (ARP) provides a mapping from an IP address to the corresponding hardware (link-layer) address.
(ii) A single TCP segment from a sender S to a receiver R cannot carry both data from S to R and acknowledgement for a segment from R to S.

Which ONE of the following is CORRECT?

  1. Both (i) and (ii) are TRUE
  2. (i) is TRUE and (ii) is FALSE
  3. (i) is FALSE and (ii) is TRUE
  4. Both (i) and (ii) are FALSE

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Show answer and explanation

Correct answer: (B) (i) is TRUE and (ii) is FALSE

Explanation

ARP maps IP to MAC addresses, so (i) is true. TCP supports piggybacking, so one segment can carry data and an ACK, making (ii) false.