Project ForgeSign up free
Computer Networks
Transport Protocols & IP Addressing
GATE 2025
Medium

Consider the 3-way handshaking protocol for TCP connection establishment. Let the three packets exchanged during the connection establishment be denoted as P1, P2, and P3, in order. Which of the following option(s) is/are TRUE with respect to TCP header flags that are set in the packets?

  • AP3: SYN=1, ACK=1
  • P2: SYN=1, ACK=1
  • CP2: SYN=0, ACK=1
  • P1: SYN=1

Explanation

The standard 3-way handshake: P1 (client→server): SYN=1, ACK=0 (D true). P2 (server→client): SYN=1, ACK=1 — the combined SYN-ACK (B true, C false). P3 (client→server): SYN=0, ACK=1, not SYN=1 (A false).

Source: GATE CS 2025 (Session 1 / CS1) (2025)

This question is part of a 15-day revision cycle — sign in and Project Forge will bring it back the day before you'd forget it.

Start revising free