The following exercise is concerned with the TCP state FIN_WAIT_2 (see Figure 5.7). (a) Describe how a

Question:

The following exercise is concerned with the TCP state FIN_WAIT_2

(see Figure 5.7).

(a) Describe how a client might leave a suitable server in state FIN_WAIT_2 indefinitely. What feature of the server’s protocol is necessary here for this scenario?

(b) Try this with some appropriate existing server. Either write a stub client or use an existing Telnet client capable of connecting to an arbitrary port. Use the netstat utility to verify that the server is in FIN_WAIT_2 state.

Figure 5.7)