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

Telecommunications Tele - at a distance Communications - exchange of information

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

LAN MAN WAN local area network less than 9 miles (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

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

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

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

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

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

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

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)

(continued) ftp Email Gateway Await file delivery

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)

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

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

The End