Question: A(5 points). Suppose machine C receives an ARP request sent from A looking for target B, and C has the binding from Bs IP address

A(5 points). Suppose machine C receives an ARP request sent from A looking for target B, and C has the binding from Bs IP address to Bs physical address in its cache. What should C do?

B(5 points). How can a workstation use ARP when it boots up to find out if any other machine is impersonating it? What is a disadvantage of this scheme?

C(5 points). In what special case would a host connected to an Ethernet not need to use ARP before transmitting an IP datagram?

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