verification
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... SA to verify that the packet is appropriate for
the SA via which it was received. A successful verification implies
that the packet came from the right IPv4 endpoint ...
... appropriate for the SA via which it was received. The successful
verification implies that the packet came from the right endpoint.
...
... source address of the packet matches the prefix. Site B
will not be able to do a similar verification for the packets it
receives. This may be quite reasonable for most of the deployment
...