Host A sends two UDP segments to Server S, one to port 1234 and the other to port 2345. Host B sends one UDP segment to Server S, port 1234. A. The server S needs to open how many server sockets, N, to handle the three segments from Hosts A and B? Answer: N = . note: Please fill in integer numbers only in the blank. B. Parts of the associated IP addresses and assigned port numbers are shown in the first half of the table below. Suppose Server S will respond to each incoming segment with reply segment back to the sending client. Please fill in the missing entries. Hosts\Address Source IP Source Port Destination IP Destination A to S (1) 1.1.1.1 5555 3.3.3.3 1234 A to S (2) 1.1.1.1 6666 3.3.3.3 2345 B to S 2.2.2.2 7777 3.3.3.3 1234 S to A (1) S to A (2) S to B