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