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EC-Council

EC0-350 · Question #890

During the TCP three way handshake, the client sends a SYN along with the ISN he will begin using. The server then responds with a SYN and ACK. After this step, before the client sends an ACK to the…

The correct answer is B. The client's ISN + 1. See the full explanation below for the reasoning.

Question

During the TCP three way handshake, the client sends a SYN along with the ISN he will begin using. The server then responds with a SYN and ACK. After this step, before the client sends an ACK to the server, what is the value of the acknowledgement number field of the server's packet?

Options

  • AThe client's ISN
  • BThe client's ISN + 1
  • CThe server's ISN
  • DThe server's ISN + 1

How the community answered

(37 responses)
  • A
    5% (2)
  • B
    73% (27)
  • C
    16% (6)
  • D
    5% (2)

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Full EC0-350 Practice