Part of the Internet technologies glossary:

A quad (pronounced KWAHD ) is a unit in a set of something that comes in four units. The term is sometimes used to describe each of the four numbers that constitute an Internet Protocol ( IP ) address. Thus, an Internet address in its numeric form (which is also sometimes called a dot address ) consists of four quads separated by "dots" (periods). For example:

    192.68.00.21
192, 68, 00, and 21 are each quads of the entire address.

A quad also means "a quarter" in some usages. (A quarter as a U.S. coin or monetary unit means "a quarter of a dollar," and in slang is sometimes called "two bits." However, this usage does not mean two binary bits as used in computers.)

This was last updated in September 2005
Posted by: Margaret Rouse

Related Terms

Definitions

  • server

    - In information technology, a server is a computer program that provides services to other computer programs (and their users) in the same or other computers. (WhatIs.com)

  • Vint Cerf (Vinton Gray Cerf)

    - Vint Cerf (Vinton Gray Cerf) is an American computer scientist best known as an Internet pioneer. With engineer Bob Kahn, Cerf developed the TCP/IP protocol suite and the architecture that enabled... (WhatIs.com)

  • SYN flood (half open attack)

    - SYN flooding is a method that the user of a hostile client program can use to conduct a denial-of-service (DoS) attack on a computer server. (SearchSecurity.com)

Glossaries

  • Internet technologies

    - This WhatIs.com glossary contains terms related to Internet technologies, including definitions about port numbers, standards and protocols and words and phrases about how the Internet works.

  • Internet applications

    - This WhatIs.com glossary contains terms related to Internet applications, including definitions about Software as a Service (SaaS) delivery models and words and phrases about web sites, e-commerce ...

Ask a Question. Find an Answer.Powered by ITKnowledgeExchange.com

Ask An IT Question

Get answers from your peers on your most technical challenges

Ask Question

Tech TalkComment

Share
Comments

    Results

    Contribute to the conversation

    All fields are required. Comments will appear at the bottom of the article.