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Internet Security You Can Afford: Using Untangle™ as Your Internet Gateway by Christopher Dawson

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APPENDIX C

GLOSSARY

American Standard Code for Information Interchange (ASCII) A system of characters used by most computers, composed of letters, numbers, punctuation, and special symbols.

central processing unit (CPU) The hardware in a computer that actually executes computing instructions.

channel service unit/data service unit (CSU/DSU) A digital interface that connects a data line such as a T1 or T3 line to a router.

DIY Short for “do it yourself.”

driver Software used to provide an interface between an operating system and a particular hardware component in a computer.

dynamic DNS A method by which dynamic IP addresses can be assigned to a static domain name with DNS records updated automatically by software. Frequently used to provide ...

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