CompTIA Security+ Exam Prep

Answer: C - Link encryption does not encrypt parameters that different link devices use to synchronize communication methods. Link encryption encrypts all the data along a specific communication path. Not only is the user information encrypted, but the header, trailers, addresses, and routing data that are part of the packets are also encrypted. Link encryption provides protection against packet sniffers and eavesdroppers. It is usually provided by service providers and is incorporated into network protocols. All of the information is encrypted and the packets must be decrypted at each hop so the router or other intermediate device knows where to send the packet next. Link encryption is sometimes called online encryption.