Which one of the following options describes the three steps in the TCP three-way handshake?

Which one of the following options describes the three steps in the TCP three-way handshake?
A . 1. SYN; 2. SYN, ACK; 3. ACK
B . 1. SYN; 2. ACK; 3. SYN
C . 1. SYN; 2. SYN; 3. ACK
D . 1. SYN; 2. ACK; 3. ACK

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Answer: A