Refer to the exhibit. You are planning the design of an encrypted WAN. IP packets will be transferred over encrypted GRE tunnels between routers B and C. The packet size is limited to a maximum of…

When router B fragments the packet after encryption, the outer IP layer splits the already-encrypted GRE packet into multiple IP fragments. Router C, as the far-end tunnel endpoint, must reassemble those outer IP fragments before it can decrypt the GRE payload.

When router B fragments before encryption, the fragments are encrypted and sent as separate tunnel packets; router C decrypts and passes them to endpoint 2, so endpoint 2 - not router C - performs IP reassembly.

When router B fragments after encryption, the outer IP fragments are reassembled by router C before decryption; endpoint 2 does not receive or reassemble fragmented packets in this scenario.

When router B fragments the inner packet before encryption, each fragment is individually encrypted and forwarded as a separate tunnel packet. Router C decrypts and forwards each fragment onward, but since the original IP datagram was split at the inner layer, endpoint 2 is responsible for final IP reassembly.

When router A fragments packets, the fragments traverse the GRE tunnel independently and router C only decapsulates them; IP-layer reassembly is performed by endpoint 2, not router C.

When router A fragments packets before they reach the tunnel, each fragment is independently encapsulated in GRE and forwarded through the tunnel. Router C decapsulates the fragments and forwards them toward endpoint 2, which performs the final IP reassembly.