Which is the right sequence of packets sent during the initial TCP three way handshake?

Which is the right sequence of packets sent during the initial TCP three way handshake?
A . FIN, FIN-ACK, ACK
B . SYN, URG, ACK
C . SYN, ACK, SYN-ACK
D . SYN, SYN-ACK, ACK

View Answer

Answer: D

Explanation:

A TCP connection always starts with a request for synchronization, a SYN, the reply to that would be another SYN together with a ACK to acknowledge that the last package was delivered successfully and the last part of the three way handshake should be only an ACK to acknowledge that the SYN reply was recived.