CODEWITHSUNDEEP
tcpiphandshake
user1673206
user1673206

Reputation: 1711

3 way handshake in TCP connection

I have a question about the TCP's three way handshake - Why there are three messages before the connection start? Why does the server reply with another seq_num after the first message from the client?

Thanks!

Upvotes: 1

Views: 210

Answers (1)

user207421
user207421

Reputation: 310859

  1. So that the client knows the connection has been accepted, and
  2. So that a sequence number for the direction server -> client had been established, as it's a full-duplex connection, i.e. with independence on each direction.

Upvotes: 2

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