GIAC Security Essentials Certification (GSEC) — Question 43

Two clients connecting from the same public IP address (for example - behind the same NAT firewall) can connect simultaneously to the same web server on the
Internet, provided what condition is TRUE?

Answer options

• A. The server is not using a well-known port.
• B. The server is on a different network.
• C. The client-side source ports are different.
• D. The clients are on different subnets.

Correct answer: C

Explanation

The correct answer is C because each client must use a unique source port for the server to differentiate between the two connections. Options A, B, and D are incorrect; the server can still be using a well-known port, can be on the same or different networks, and the clients’ subnets do not affect their ability to connect simultaneously through NAT.