TCP port 1701 is used by which VPN protocol?

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Study for the CCST Cybersecurity Test. Study with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

TCP port 1701 is used by which VPN protocol?

Explanation:
Port numbers help identify which VPN protocol is being used. Layer 2 Tunneling Protocol uses UDP port 1701 for its control channel and is often deployed with IPsec to provide encryption for the tunnel. That combination—L2TP with the 1701 port—is why this protocol is the one associated with that port. In contrast, SSH typically uses port 22, Remote Desktop Protocol uses port 3389, and PPTP uses port 1723 for the control channel (with GRE handling the actual data). So port 1701 points to L2TP.

Port numbers help identify which VPN protocol is being used. Layer 2 Tunneling Protocol uses UDP port 1701 for its control channel and is often deployed with IPsec to provide encryption for the tunnel. That combination—L2TP with the 1701 port—is why this protocol is the one associated with that port. In contrast, SSH typically uses port 22, Remote Desktop Protocol uses port 3389, and PPTP uses port 1723 for the control channel (with GRE handling the actual data). So port 1701 points to L2TP.

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