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The authentication header ( AH ) in LPSec includes a message authentication code ( MAC ) , which is calculated over all _ of the
The authentication header AH in LPSec includes a message authentication code MAC which is calculated over allof the fields of the IPSec packet except IP header fields that either do not change in transit immutable or that are predictable in value upon arrival at the endpoint for the AH SA Fields that may change in transit and whose value on arrival are unpredictable are set to zero for purposes of calculation at both source and destination.
For each of the fields in the IPv header, indicate whether the field is immutable, mutable but predictable, or mutable.
Do the same for the IPv header.
In each case, justify your decision for each field.
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