1. Telnet Traditional Terminal-Host Communication Log into host computer
You can run programs there, such as
Processing is done on the host
Expensive if long-distance connection
Host
Terminal or
PC Emulating
a Terminal
Phone Line

2. Telnet Uses Internet to Connect to Host
Can access host from anywhere on the Internet
Telnet Software on Client Host
Manages login, use, and disconnections
Telnet
Telnet

3. Telnet Poor User Interface Based on dumb VT100 terminal (Module H)
Text-only display
Monochrome (One color for text, one for background)
Have to type command-line commands
Often have complex syntax

4. Why Not POP and IMAP? Not all mail hosts support POP and IMAP
With most mail readers, you have to store contact information within some preferences file
Inconvenient in school labs or Internet cafes
Telnet is not limited to
Can be used with other applications