| 4.1 | In Section 4.4, we stated that the INADDR_ constants defined by the <netinet/in.h> header are in host byte order. How can we tell this? |
| 4.2 | Modify Figure 1.5 to call getsockname after connect returns successfully. Print the local IP address and local port assigned to the TCP socket using sock_ntop . In what range (Figure 2.10) are your system's ephemeral ports? |
| 4.3 | In a concurrent server, assume the child runs first after the call to fork . The child then completes the service of the client before the call to fork returns to the parent. What happens in the two calls to close in Figure 4.13? |
| 4.4 | In Figure 4.11, first change the server's port from 13 to 9999 (so that we do not need super- user privileges to start the program). Remove the call to listen . What happens? |
| 4.5 | Continue the previous exercise. Remove the call to bind , but allow the call to listen . What happens? |