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TCP/IP Applications

To understand the applications that use TCP/IP networks, a tech needs to know the structures below those applications that make them work. Have you ever opened multiple Web pages on a single computer? Have you ever run multiple Internet programs, such as a Web browser, an e-mail client, and a chat program, all at the same time? Clearly, lots of data is moving back and forth between your computer and many other computers. If you have packets coming in from two, three, or more other computers, there has to be a mechanism, a process, something that knows where to send and receive that data.

In this tutorial, you'll discover the process used by TCP/IP networks to make sure the right data gets to the right applications on your computer. This process works through the use of some very important Transport layer protocols, TCP, UDP, and ICMP, the magic of port numbering. When used together, TCP and UDP along with port numbers enable work to get done on a network.

In this tutorial:

  1. Transport Layer Protocols
  2. TCP
  3. UDP
  4. ICMP
  5. IGMP
  6. The Power of Port Numbers
  7. Registered Ports
  8. Connection Status
  9. Rules for Determining Good vs. Bad Communications
  10. Common TCP/IP Applications
  11. HTTP
  12. Publishing Web Pages
  13. Web Servers and Web Clients
  14. Secure Sockets Layer and HTTPS
  15. Telnet
  16. Telnet Servers and Clients
  17. Configuring a Telnet Client
  18. Rlogin, RSH, and RCP
  19. SSH and the Death of Telnet
  20. E-mail
  21. SMTP, POP3, and IMAP4
  22. Alternatives to SMTP, POP3, and IMAP4
  23. E-mail Servers
  24. FTP
  25. Passive vs. Active FTP