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].
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.
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.
