N10-005 Question #641: Real Exam Question with Answer & Explanation

The correct answer is B: 80. Standard HTTP traffic uses port 80. To route all HTTP web traffic through a proxy server listening on port 8080, the firewall must intercept and redirect traffic destined for port 80 to port 8080 on the proxy. Port 20 is FTP data transfer, port 143 is IMAP (email retrieval), and

Question

A company would like all HTTP traffic to filter through a proxy server on port 8080. Which of the following port numbers needs to be redirected through the proxy server to accomplish this?

Options

A20
B80
C143
D443

Explanation

Standard HTTP traffic uses port 80. To route all HTTP web traffic through a proxy server listening on port 8080, the firewall must intercept and redirect traffic destined for port 80 to port 8080 on the proxy. Port 20 is FTP data transfer, port 143 is IMAP (email retrieval), and port 443 is HTTPS - only port 80 carries standard unencrypted HTTP traffic that would need this redirection.

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