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A system of exchanging messages by means of computers attached to a network.
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A group of keyboard characters that take on facial expressions and are used to express emotion in text-based electronic communication, i.e. e-mail, or instant messaging. The most commonly-used symbols are :-) [smile] and :-( [sad].
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A way of coding the information in a file or e-mail message so that if it is intercepted by a third party as it travels over a network it cannot be read. Only the persons sending and receiving the information have the key and this makes it unreadable to anyone except the intended persons.
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A local-area network (LAN) protocol developed by Xerox® Corporation in 1976. It is one of the most widely implemented LAN standards.
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An Ethernet hub or concentrator is a device for connecting multiple twisted pair or fiber optic Ethernet devices together, making them act as a single segment.
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An Ethernet switch, also known as a Network switch, is a computer networking device that connects network segments.
