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Which of the following provides the best protection for a networks traffic?

Which of the following provides the best protection for a networks traffic?

PrepAway - Latest Free Exam Questions & Answers

A.
Link encryption because it does not encrypt headers and trailers

B.
Link encryption, which encrypts everything but data link messaging

C.
End-to-end encryption because it encrypts all headers and trailers

D.
End-to-end encryption because headers have to be decrypted at each intermediate device

Explanation:
Link encryption provides encryption at a lower end of the OSI model;
it works at the data link and physical layers. All information, including header
information, is encrypted. End-to-end encryption works at the application and
presentation layers and does not encrypt the actual packet headers, but only the
packet’s data payload. Data link messaging is connection maintenance, error
detection, and correction used by the link encryption software. This information is
not encrypted. Link encryption provides a higher level of protection by encrypting
all data, not just the payload.


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