PCCET · Question #198
PCCET Question #198: Real Exam Question with Answer & Explanation
The correct answer is D: Tunneling within commonly used services. Tunneling is a method of transporting data across a network using protocols that are not supported by that network. Tunneling works by encapsulating packets: wrapping packets inside of other packets. Tunneling within commonly used services is a technique that uses file sharing or
Question
Which technique uses file sharing or an instant messenger client such as Meebo running over Hypertext Transfer Protocol (HTTP)?
Options
- AUse of non-standard ports
- BHiding within SSL encryption
- CPort hopping
- DTunneling within commonly used services
Explanation
Tunneling is a method of transporting data across a network using protocols that are not supported by that network. Tunneling works by encapsulating packets: wrapping packets inside of other packets. Tunneling within commonly used services is a technique that uses file sharing or an instant messenger client such as Meebo running over HTTP to bypass firewalls or other network restrictions. The data packets are encapsulated within HTTP packets and sent as normal web traffic. This way, the data packets can reach their destination without being blocked or detected by the network.
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