Technology / Computers / Router: A device that connects any number of LANs. Routers use headers and a forwarding table to determine where packets go, and they use ICMP to communicate with each other and configure the best route between any two hosts. Very little filtering of data is done through routers. Routers do not care about the type of data they handle.
Technology / Computers / CPE: This refers to ports or other equipment supplied by the manufacture so that the end user can connect to a network. A typically supplied CPE is either a switch or a router. MORE
Technology / Aviation / Firewall: A fire-resistant bulkhead that isolates the engine from other parts of an airplane's structure. MORE