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![]() Attachment A part of an email message. Usually a file (a data file or a multimedia file) or a webpage. It is not a part of the text of the message, instead it is attached to the message. AU Audio file format for Unix systems. Authentication Authentication is used to confirm the identity of the other party involved in the data transmission. AVI Audio/Video Interleave. Audio file format used by Microsoft Widows. B Channel Bearer Channel. It is a 64 Kbps communication channel in ISDN. Backbone Main high-speed network connection composing the Internet. Backbones are operated by major telecommunications companies like Sprint, MCI, or AT&T. Internet backbone maps are here. Bandwidth Bandwidth is the amount of data that can be transferred over the network in a fixed amount of time. On the Net, it is usually expressed in bits per second (bps) or in higher units like Mbps (millions of bits per second). 28.8 modem can deliver 28,800 bps, a T1 line is about 1.5 Mbps. Basic Rate Interface (BRI) A BRI line is one of two access methods for ISDN (the other one is Primary Rate Interface - PRI). A BRI has two 64 Kbps B channels and one 16 Kbps D channel. Baud The rate at which bits are transmitted over a communication link. Baud is the number of transitions (that are used to encode bits) that take place in one second. Binary Data represented in binary format uses only two digits - 0 and 1. binary mode FTP client mode used to transfer binary files (multimedia files, executables and other data files). Not suitable for transferring normal text files. Bit (Binary DigIT) the smallest unit of information, comprising of either a 1 or 0. Bit rate The speed at which bits are transmitted over a communication link. Expressed in bits per second (bps). Body The part of an email message that contains the actual text of the message. free web site, Free Web Hosting. free web site page
Electronic Mail (E-Mail, email) One of the most popular Internet services. Basically it's the transmission of text based messages. An email message can also contain more structured elements, like tables, images and multimedia. It can also be used to send various data files, by means of attachments. You have to have an email account in order to be able to use this service. Encryption Encryption means encoding data using a cryptographic cipher. Encrypted data can be read (decrypted) only by an authorized entity. Ethernet Local Area Network (LAN) protocol invented by Xerox Corporation. It is a broadcast protocol that uses CSMA/CD method and utilizes electrical cables. It can run at various speeds: 10Mbps, 100Mbps and even 1000Mbps. IEEE 802.3 standard describes Ethernet. Word Ethernet is also sometimes used to describe the implementation that runs at the speed of 10Mbps. Extranet A part of the company's network that is made accessible for some group of people. Sometimes protected by a password or some other kind of authentication. It allows users to access some of the non-public data, eg. a person's credit card balance. FAQ (Frequently Asked Question) Lists of frequently asked questions and answers to them are used as a way of sharing knowledge on the web. They are a very good way of finding solutions to different problems. Some companies include them in their websites to minimize the number of Customer Support inquiries. Fast Ethernet Fast Ethernet is the implementation of Ethernet standard that operates at the speed of 100Mbps. FCC (Federal Communications Commission). U.S.A. telecommunications regulatory organization. It controls standards that pertain to electronic and electromagnetic transmission and also licenses the frequencies and bandwidth for the commercial use. FDDI (Fiber Distributed Data Interface). A very high speed network protocol. Uses fiber-optic cable, and is mainly used as the backbone network protocol due to its speed. It is also often the choice for critical applications due to its reliability. Fibre Optic Cable A cable used for transmitting data as a light wave. A fiber optic cable is composed of one or more optical fibers. It is more expensive that copper wire, but offers higher transmission speeds and allows for communication over larger distances. Filename extension Last three or four letters of a file name that appear after the dot. Used to designate the type of file and the format used. free web site page. Free Web Hosting
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