Refer to Figure 3 Using Fork.

17	for ( ; ; ) {
18
19	connfd = Accept(listenfd, (SA *) NULL, NULL);
20
21	if(childpid =Fork()) ==0)
22	{
23	Close(listenfd);
24
25	DATA EXCHANGE WITH CLIENT APPLICATION
26
27	Close(connfd);
28
29	exit(0);
30
31	}
32
33	Close(connfd);
34
35	}

Figure 3 Using Fork.

a)Describe the purpose and basic operation of the Fork function. In your answer explain the relationship between the Child process and Parent process and identify which lines of code refer to each process. b)The listening socket is closed on line 23. Explain why it is closed here and explain whether this affects future connection requests. c)Given that the connected socket is most likely closed within the Parent process before the Child process has exchanged any data with the Client application, explain how this is possible.