Token

Besides those small copper coins that allow you to play video games, there are three different type of tokens: 1. In networking, a token refers to a special series of bits that circulate on a token-ring network. The token allows the system which has it to send information over the network. Since there is only one token for each network, only one computer at a time can send data. 2. In programming, a token is a single element of a programming language. Some examples of programming tokens are reserved words, punctuation marks, and operators. 3. In security systems, a token is small card that displays an ID code which can be used to log into a network. The card user enters a password which causes the card to display the current ID needed to log into the network. The token adds an extra security level to network access because the IDs change every 5 minutes or so.