Making reference to Yusuf's flash card questions, the following functions are listed for each protocol:
AH - data integrity and data origin authentication. The answer's explanation then further adds: optional replay protection ESP - data confidentiality, and optionally data integrity, data origin authentication, and replay protection. This is just the kind of explanation that totally makes it confusing for me to understand what functions to list for each protocol when asked "What function does ESP/AH provide?" Would I be marked wrong if I listed all three functions for AH and all four functions for ESP, or would I be expected to state which are only optional functions or not list the optional functions at all? Mark
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