Network Dictionary is designed to help computer networking and telecom professionals and students to navigate the computing and communication technologies and services smoothly. This dictionary includes terms from multiple fields that were separated before. Terms, phrases used across multiple fields can mean many different things. Complicated. We mark every term by its primary fields so that readers can better understand the context and background of the term. Uncomplicated. The categories used in the book are: Networking : includes data networking phrases, pluses terms related to the Internet Protocol : includes protocols used and defined in various communications industries Security : includes networking, computing and information security related terms Telecom : includes terms primarily for traditional voice communication through wire-lines Wireless : terms for wireless communications that may be local, fixed, or mobile Hardware : terms related to computer and network hardware Software: computer software phrases and terms Organization : includes government organizations and industrial associations