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Understanding Networking: LANs, WANs, and Internet Connectivity

This lecture by Professor Jaime Burkhalter, also known as Gerald Knezek, delves into the fundamentals of telecommunications, including the structures of different networks—Desktop Area Networks (DAN), Local Area Networks (LAN), Metropolitan Area Networks (MAN), and Wide Area Networks (WAN). It covers essential protocols such as TCP/IP, email services, and terminal emulation software. Students will learn about the hardware and software necessary for effective internet communication and the differences in transmission speeds. The course is designed for those interested in the technology and cognition behind networking.

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Understanding Networking: LANs, WANs, and Internet Connectivity

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  1. Connections by Jaime Burkhalter (A.K.A. Gerald Knezek) Professor of Technology & Cognition University of North Texas

  2. Telecommunications • Tele - at a distance • Communications - exchange of information

  3. Computer Networks • DAN • Desktop Area Network • Cluster • less than 30 machines • near to each other (continued)

  4. (continued) • LAN • local area network • less than 9 miles • MAN • metropolitan area network • less than 50 miles • WAN • wide area network • greater than 50 miles

  5. Internet • Network of networks • All use TCP/IP protocols • Support basic services • Email (SMTP) • Telnet • FTP (continued)

  6. (continued) • Supports numerous servers and clients • JOVE Unix system at UNT, Tenet in Austin • Listservs • Gopher, WWW, etc.

  7. Equipment for Interactive Access to Basic Services(Real-Internet-Time) • Personal Computer • Modem (modulator - demodulator) (continued)

  8. (continued) • Terminal Emulation Software • ProComm+ (IBM) • Zterm (Mac) • Phone Line

  9. Modem Communication Concepts • Local Echo • Originate vs. Answer Mode • Serial vs. Parallel Transmission (continued)

  10. (continued) • Start and Stop Bits • Transmission Speed (baud vs. bps) • Parity • Handshaking • Terminal Types

  11. Distributed Modes of Basic Services • Not Real-Internet-Time (NRIT) • Email • POP Mail (Post Office Protocol, DOS/UNIX Environments) • Eudora (GUI POP-like system for Mac) (continued)

  12. (continued) • ftp • Email Gateway • Await file delivery

  13. Interactive Access to Full Internet Services • High Speed Line Preferred • Personal Computer must be ITI • (In the Internet) • must have IP address • 129.120.20.127 for example (continued)

  14. (continued) • Must have Provider-Client Link (TCP/IP) • SLIP • PPP (Preferred Service available at UNT) • Wireless (experimental)

  15. High Speed vs. Low Speed Lines • Low Speed Lines • 28.8 bps • Medium Speed Lines • ISDN (64 kbps) • High Speed Lines • T1 (1.44 Mbps)

  16. The End

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