Briefly describe the IPv6 Authentication extension header.
What will be an ideal response?
The Authentication extension header is designed to specify the true origin of a packet by preventing address spoofing and connection theft. This header also provides an integrity check on those parts of the packet that do not change in transit. (Authentication would not be calculated over the Routing extension header, for example.) In addition, the Authentication extension header can provide a limited defense against replay attacks. End devices may, if configured to do so, reject packets that are not properly authenticated.
The Authentication extension header starts with a 1-byte Next Header field that indicates the next header in the chain.
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