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a central network connecting other networks together.

1) the transmission rate of a communications line or system, expressed either as cycles per second/hertz for analog lines, or as bits (bps) or kilobits per second (Kbps) for digital systems; 2) line speed; 3) the amount of information that can be transmitted over communications lines at one time.

Bandwidth competition
a bottleneck, however brief, when two or more files are simultaneously transmitted over a single line. Unless the system is able to prioritize among the files, the effect is to slow delivery of each.

a graphic image displayed on an HTML page used as an ad. See iab.net for voluntary guidelines defining specifications of banner ads.

the exchange of goods and services without the use of cash. The value of the barter is the dollar value of the goods and services being exchanged for advertising. This is a recognized form of revenue under GAAP (Generally Accepted Accounting Principles).

BtoB/B2B (Business-to-Business)
businesses whose customers are other businesses.

BtoC (Business-to-Consumer)
businesses whose major customers are consumers.

BBS (Bulletin Board System)
software that enables users to log into e-mail, usenet and chat groups via modem.

a snippet of code placed in an ad, on a Web page, or in an email which helps measure whether the ad, page or email was delivered to the browser and to track actions in general. Also known as a clear GIF or pixel tag.

a test version of a product, such as a Web site or software, prior to final release.

a term referring to any advertisement that is not a banner, e.g. an interstitial, streaming video ads, etc.

the smallest unit of data in a computer. A bit has a single binary value of either 0 or 1. There are eight bits in a byte.

Bit rate
a measure of bandwidth which tells you how fast data is traveling from one place to another on a computer network. Bit rate is usually expressed in kilobits (100 bits) per second or Kbps.

Bonus impressions
additional ad impressions above the commitments outlined in the approved insertion order.

short for robot. See intelligent agent, robot.

what happens when e-mails are returned to the mail server as undeliverable.

an Internet connection that delivers a relatively high bit rate - any bit rate at or above 100 Kbps. Cable modems, DSL and ISDN all offer broadband connections.

a software program that can request, download, cache and display documents available on the World Wide Web. Browsers can be either text-based or graphical.

Browser sniffer
see sniffer.

when a streaming media player saves portions of a streaming media file until there is enough information for the stream to begin playing.

1) clickable graphic that contains certain functionality, such as taking one someplace or executing a program; 2) buttons can also be ads. See iab.net for voluntary guidelines defining specifications of button ads.


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