Which term refers to the initial request sent to establish a TCP session with a web server?

Which term refers to the initial request sent to establish a TCP session with a web server?

• A. SYN request
• B. SYN Flood
• C. Telnet
• D. Terminator

Answer: (A)

Opening a TCP connection begins with the client sending a segment that has the SYN flag set—the SYN request. This is the signal that starts the three-way handshake to establish a session with the web server. After that, the server replies with a SYN-ACK and the client finishes with an ACK to complete the connection. The SYN request is the term that specifically describes that initial synchronization packet used to initiate the session. A SYN Flood is a flood of SYN packets aimed at overwhelming a server (an attack), not the normal initiation of a single session. Telnet is a separate remote-login protocol and does not describe the initial handshake. Terminator is unrelated.

Opening a TCP connection begins with the client sending a segment that has the SYN flag set—the SYN request. This is the signal that starts the three-way handshake to establish a session with the web server. After that, the server replies with a SYN-ACK and the client finishes with an ACK to complete the connection. The SYN request is the term that specifically describes that initial synchronization packet used to initiate the session. A SYN Flood is a flood of SYN packets aimed at overwhelming a server (an attack), not the normal initiation of a single session. Telnet is a separate remote-login protocol and does not describe the initial handshake. Terminator is unrelated.