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In a TCP 3-way handshake, what is the second TCP flag to be set?
ACK
SYN
SYN/ACK
TCP Three Way Handshake (1. SYN, 2. SYN-ACK, 3. ACK)
Host A sends a TCP SYNchronize packet to Host B Host B receives Host A's SYN Host B sends a SYNchronize-ACKnowledgement Host A receives Host B's SYN-ACK Host A sends ACKnowledge Host B receives ACK. TCP socket connection is ESTABLISHED
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