Glossary p

A component protocol of PPP, used to send usernames and passwords as clear text.

In Frame Relay, a network in which not all pairs of Frame Relay-connected devices have a PVC between them.

A string of characters, kept private from other people, that is used to prove that a user is who he claims to be.

A short LAN cable used as one of several cables in a structured wiring system. For example, the cable from a PC to a wall plate is a patch cable.

A convenient place for an electrician to connect the wires in cables that terminate in a wiring closet. The wires are connected to one side of the panel. The panel provides an electrical pathway to other plugs, or receptacles, much like the ones in the wall plate in a cubicle. The patch panel allows an electrician, or network engineer, to use a short patch cable to connect those pairs of wires to other devices.

A computer that a singer user typically uses. It usually has one keyboard, one display, and one mouse.

Generic term referring to the combination of cabling, networking devices, and network interface cards (NICs) in the computers, which together provide the physical capability to transmit and receive data across a network.

A broadcast domain created by a combination of computers, cables, and networking devices.

A cable with either copper wires or optical fibers over which electrical (copper) or light (fiber) energy can be passed. Binary data can be transmitted over such media through encoding conventions that define what particular electrical or light energy implies a binary 0 or 1.

The physical position at the end of a connector where the copper part of the wire sits.

The name Cisco uses to brand its firewall product line.

A building that houses equipment that an ISP owns.

A TCP/IP protocol, defined in RFC 1939, that defines the messages that control the transfer of e-mail. POP3 is typically used only by clients, and only when retrieving e-mail from a POP3 server.

Another term for POP3 Server Software.

Software that implements the POP3 server features.

A data link layer protocol that is used on WAN links.

In Ethernet, a series of alternating binary 1s and 0s at the beginning of a new frame.

A computer that performs print services.

The process by which one computer, typically called a print server, allows other computers to send it files that are then printed on a printer that is physically attached to the print server.

In law enforcement, a characterization of how criminals typically operate, so that law enforcement personnel can more easily catch the criminals.

A general term referring to the variety of telephone networks and services in place worldwide. Sometimes called plain old telephone service (POTS).

A networking model for which no one vendor dictates the standards and protocols, with individuals from many companies and organizations participating in the standards definition process.

FTP term meaning that the FTP client is moving a file from itself to the serverin other words, it's putting the file on the server.

A predefined Frame Relay VC. A PVC can be equated to a leased line in concept.