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In Three-Way Handshaking process, the situation where both the TCP’s issue an active open is ___________

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In Three-Way Handshaking process, the situation where both the TCP’s issue an active open is ___________

(a) Mutual open

(b) Mutual Close

(c) Simultaneous open

(d) Simultaneous close

I had been asked this question in an interview.

My doubt is from TCP-2 topic in chapter Transport Layer of Computer Network

1 Answer

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Best answer
Correct choice is (c) Simultaneous open

The best I can explain: In simultaneous open situation, two nodes send an SYN signal to each other and start a TCP connection. Here, both TCP nodes transmit a SYNC+ACK segment to each other and a connection is established between them. This doesn’t happen usually, because both sides have to know which port on the other side to send to.

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