A process on computer A has opened a UDP socket sd1 and bound to port 25000. A process on computer B has opened a TCP socket sd2 and bound to port 35000. Assume we use the Berkeley socket calls described in the book to interact with the sockets and that we are using unicast addresses.

a) Is it possible for 2 or more UDP sockets to be bound to the same port number on the same machine at the same time? Explain why or why not.

b) Can the process with socket sd1 communicate with the process with socket sd2 (through sd1 and sd2 of course)? Explain why or why not.

c) Explain how the process with socket sd1 can send to multiple destinations using a single UDP socket. Be specific.

d) Explain how the process with socket sd1 can receive from multiple destinations using a single UDP socket and determine who the source of the respective packets is. Be specific.

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