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