Consider the network below. Suppose that the remote host and server communicate
ID: 3681772 • Letter: C
Question
Consider the network below. Suppose that the remote host and server communicate with the ESP protocol in tunnel mode.
An IP datagram emitted by the server and destined to the remote host will have whose IP address for the source address and whose IP address for the destination address?
When this datagram arrives at the router, the router may or may not transform it into another IP datagram. The IP datagram sent by the router will have whose IP address for the source address and whose IP address for the destination address?
Explanation / Answer
An IP datagram emitted by the server and destined to the remote host will have whose IP address for the source address and whose IP address for the destination address
= Source address = server’s IP address; destination address = remote host’s IP address.
When this datagram arrives at the router, the router may or may not transform it into another IP datagram. The IP datagram sent by the router will have whose IP address for the source address and whose IP address for the destination address
=> Source address = router interface IP address; destination address = remote host’s IP address.