A SIMPLE DATA COMM. MODEL

•Host Computer - where the processing takes place
–Mainframes
–Minicomputers
–Microcomputers (PCs)
–Super Computers
•Terminal - a device that communicates with a host
–Dumb - Send/Receive data. Can’t modify data
–Smart - Sends extra info to host (e.g., terminal ID)
–Intelligent - Programmable
•PCs are the most “intelligent” terminal
–Can emulate any of the three listed above.
–Can also act as a host in some situations