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Understanding Networking: Protocols, Models, and Commands in Internet Systems

This chapter explores the foundational concepts of networking, presenting visual aids such as network diagrams and layered models. It covers the TCP/IP protocol suite, IPv4 address classes, and the structure of the Internet domain name hierarchy. Key remote command utilities like ping, telnet, and FTP are discussed, along with their usage in client-server environments. Tables detail common commands and protocols, providing practical insights into network operations and domain addressing. This comprehensive guide is essential for networking professionals and enthusiasts alike.

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Understanding Networking: Protocols, Models, and Commands in Internet Systems

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  1. Chapter 14 Networking

  2. Figure 14.1  (a) A network of six hosts (b) An internetwork of four networks

  3. Figure 14.2  ISO and TCP/IP layered models, mapping between the two, and the general purpose of a group of layers

  4. Figure 14.3  The TCP/IP protocol suite

  5. Figure 14.4  IPv4 address classes

  6. Table 14.1 IPv4 Address Classes and Valid IP Addresses

  7. Figure 14.5  An internetwork of four networks with one class A, one class B, and two class C networks

  8. Table 14.2 Top-Level Internet Domains

  9. Figure 14.6  A portion of the Internet domain name hierarchy

  10. Domain Address Lookup Syntax nslookup [-option] [name | -] [server] With no arguments, returns stats for current default NS Other options for returning stats of specific servers, hosts within domain, etc

  11. Table 14.3 Popular Internet Services and Corresponding Protocols

  12. Figure 14.7  Depiction of the client–server software model

  13. Common Remote Commands • rwho who’s logged in where in LAN • rusers who’s logged in • ruptime show status of hosts on LAN • ping test for echo from remote host • finger display info about user • rlogin remote login (LINUX/UNIX only) • telnet remote login (general) • ftp file transfer program • rcp remote copy • rsh remote shell • talk interactive chat program • traceroute displace details of route

  14. Table 14.4 Commonly Used Telnet Commands

  15. Figure 14.8  The semantics of the rsh upsun29 ps command

  16. Figure 14.9 The semantics of the command: rsh upsun29 sort students > sorted_students

  17. Table 14.5 A Summary of Useful FTP Commands

  18. Table 14.5 A Summary of Useful FTP Commands

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