Ports for Not Yet Techies

"Computer Careers: Connecting Peripheral Devices to PCs"

by Richard Stooker, President Info Ring Press and author of Secrets of Changing to a Computer Career

Ports can also be called connectors. They are where a device can be connected to your computer. There are two basic kinds of ports:

Serial ports (or COM) -- these support sequential, one bit at a time transmission of data and are used for such devices as scanners, keyboards, modems and mice. Their communications adhere to the RS-232C standard.

Parallel ports (or LPT, which comes from line printer) -- these support multiple-bit at a time transmission of data to devices, particularly printers

They used techniques of time division and space division to separate the transmission of individual bits of information to send them in parallel with each other.

Also, they come in different designs, shapes and sizes. There are over 50 separate ones that are in six different categories:

DB
DIN
Centronics
RJ
BNC
audio

These are the basics of ports.

Next: Postfix

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