Data Link Layer Confidentiality [Archive]

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CISSP_Candidate

08-29-2006, 10:28 AM

Question 204. Which of the following OSI layers does not provide confidentiality?

A Presentation
B Network
C Data Link
D Transport

Jescoi

08-29-2006, 10:29 AM

Answer is C. I don't understand this as I thought link encryption is provided by layer 2 security protocols, and encryption leads to confidentiality. For example PPTP?