CompTIA A+ Complete Study Guide

18.6. Answers to Review Questions

1. C. The Telnet protocol uses port 23. If this port is blocked, Telnet cannot be used.

2. A. When SSL and HTTP are used together, the beginning of the site address becomes https://.

3. B. The ipconfig utility can be used at the command line with Windows XP to see the networking configuration values. Ifconfig is a Unix-based utility; winipcfg is a Windows-based utility similar to ipconfig, and there is no Windows hijack utility.

4. C, D. Each TCP/IP protocol uses a particular port number. In this case, the HTTP protocol uses port 80 and HTTPS uses port 443. Telnet uses port 23. FTP requires two ports (21 and 20) to establish the connection and send data; most FTP requests result in FTP opening an arbitrary higher-numbered ...