Transmission Control Protocol/Internet Protocol) A communications protocol developed under contract from the U.S. Department of Defense to internetwork dissimilar systems.TCP/IP is the protocol of the Internet and the global standard for local area networks and wide area networks

Time periods that control devices. Examples of how they are used are to allow or deny physical card holder access to doors based on time of day, day of week, or on a holiday. They are often used to unlock a main facility entrance from the opening of the business day to the close of business.

Any increase or decrease in the excursion of voltage, current, power, heat and so forth, above or below a nominal value that is not normal to the source.

A cable that consists of one or more pairs of insulated wires that are twisted around one another. Twisted pair is often specified for circuits carrying data.