Backbone - The primary trunk carrying voice or data traffic between switches. All systems that connect to the backbone can connect to each other. This does not prohibit systems from setting up separate arrangements to connect directly with each other, bypassing the backbone, for cost, performance, or security reasons.
Bandwidth - Capacity or volume inherent in every telecommunications line. A full page of English text is about 16,000 bits. A fast modem can move about 15,000 bits in one second. Full-motion full-screen video would require roughly 10,000,000 bits-per-second, depending on compression.
Banner - A (generally) rectangular, graphic (usually paid) advertisement displayed on a web page. Interested viewers click on the banners and are linked directly to the advertiser's web site.
Baseband - The total frequency band occupied by the aggregate of all the voice and data signals used to modulate a radio carrier.
Bookmark - It's just an address book entry for a web Address. Some browsers call this a Favorite Place or a Hot Spot. Most browsers contain a simple "address book" where the reader can store the addresses of their favorite places. Click on the name of the place, and the Browser automatically goes there, like an online phone book with an autodialer.
Broadband - Broadband is a descriptive term for evolving digital technologies that provide consumers a signal switched facility offering integrated access to voice, high-speed data service, video-demand services, and interactive delivery services.
Browser - Software that allows you to view and explore the Internet (primarily the WWW). The most common browsers are Netscape Navigator and Microsoft Internet Explorer. When you type an address in the browser or click on a link in an e-mail, the browser goes out over the Internet and gets the files that you requested. Not all browsers have the same features or capabilities.
Byte - A set of Bits that represent a single character. Usually there are 8 Bits in a Byte, sometimes more, depending on how the measurement is being made.