Communication Networks/Glossary

Access Point

A layer 1 device that interconnects a wireless network with a wired network.

Bridge

A layer 2 device that interconnects two or more existing networks.

Firewall

A multi-layer device that makes decisions on what data to forward on to its destination, and what data to block from its destination.

Hub

A layer 1 device that physically connects two or more network devices together. Similar to a switch, but less efficient. Every device receives and sends to and from every other device connected to the hub.

Network

A collection of two or more devices which are interconnected using common protocols to exchange data.

Node

Any device connected to a network.

Protocol

Any agreed upon standard used for communication.

Request for Comments (RFC)

A specification of an internet standard or protocol.

Router

A layer 3 device that decides how to forward a packet based on its desired destination.

Switch

A layer 2 device that logically connects two or more devices in a network for more isolated communication. Some devices sold as switches are also capab