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Backbone

A high-speed line or series of connections that forms a major pathway within a network. The term is relative, as a backbone in a small network will likely be much smaller than many non-backbone lines in a large network.

Bandwidth

The difference between the highest and lowest frequencies available for network signals. The term is also used to describe the rated throughput capacity of a given network medium or protocol. In short, bandwidth is a loose term used to describe the throughput capacity (measured in Kilobits or Megabits per second) of a specific circuit.

Base URL

An optional URL that you assign to a page to convert relative URLs on the page into absolute URLs. A base URL should end with a document name part, such as http://sample/sample.htm, or a trailing slash, such as http://sample/subdir/.

Blacklist

An online database of IP addresses that may be used for spam filtering, either on a personal basis or used by an entire site.

Bps

(Bits-Per-Second) -- A measurement of how fast data is moved from one place to another. A 28.8 modem can move 28,800 bits per second.

Broken hyperlink

A hyperlink that does not correctly point to a page or other Internet file. A broken hyperlink indicates either an incorrect URL or a missing page or file.