A demarc extension is the process of connecting your organizationâs network to a data lineâsuch as a T1, DSL, or POTSâprovided by the telephone company or another vendor.
Legacy system. In computing, a legacy system is an old method, technology, computer system, or application program, of, relating to, or being a previous or outdated computer system.. Often a pejorative term, referencing a system as legacy means that it paved the way for the standards that would follow it.
A knowledge base (KB) is a technology used to store complex structured and unstructured information used by a computer system. The initial use of the term was in connection with expert systems which were the first knowledge-based systems.The original use of the term knowledge-base was to describe one of the two sub-systems of a knowledge-based system.t this point in the history of Information Technology the distinction between a database and a knowledge-base was clear and unambiguous. A database had the following properties: 1  Flat data. 2  Data was usually represented in a tabular format with strings or number in each field.