Which tool bypasses the HTTP proxy to access blocked services such as email and instant messaging?

Which tool bypasses the HTTP proxy to access blocked services such as email and instant messaging?

• A. HTTPort
• B. Super Network Tunnel
• C. ACK bit
• D. ICMP protocol

Answer: (A)

When traffic is blocked by an HTTP proxy, you can hide non-HTTP services inside normal HTTP requests so the proxy lets it through. HTTPort is designed for this by tunneling arbitrary TCP streams through an HTTP proxy. The client sends data encoded within regular HTTP requests to a remote server, which then forwards it to the blocked service (like email or instant messaging). Since the proxy sees what looks like standard HTTP traffic, the restrictions are bypassed. The other options don’t fit because they don’t provide a method to disguise or route non-HTTP traffic through an HTTP proxy: an ACK bit is part of TCP’s reliability, ICMP is a network-layer protocol used for diagnostics, and the unnamed alternative isn’t a recognized proxy-bypass tool.

When traffic is blocked by an HTTP proxy, you can hide non-HTTP services inside normal HTTP requests so the proxy lets it through. HTTPort is designed for this by tunneling arbitrary TCP streams through an HTTP proxy. The client sends data encoded within regular HTTP requests to a remote server, which then forwards it to the blocked service (like email or instant messaging). Since the proxy sees what looks like standard HTTP traffic, the restrictions are bypassed. The other options don’t fit because they don’t provide a method to disguise or route non-HTTP traffic through an HTTP proxy: an ACK bit is part of TCP’s reliability, ICMP is a network-layer protocol used for diagnostics, and the unnamed alternative isn’t a recognized proxy-bypass tool.