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To: koan who wrote (47631)	8/20/2007 12:34:23 AM
From: E. Charters	Read Replies (1) \| Respond to of 78417

Packet switcher is whatidiz A router can handle the inputs of several computers, route them onto a network and then handle the packets of the replies and send them to the appropriate computers that sent them out. It does this by maintaining a routing table with the TCP/IP addresses of the computers and interpreting the marked headers of the packets so that they go to the right addresses. Nat-churlishly. The very first device that had fundamentally the same functionality as a router does today, i.e a packet switch, was the Interface Message Processor (IMP); IMPs were the devices that made up the ARPANET, the first packet switching network. The idea for a router (although they were called "gateways" at the time) initially came about through an international group of computer networking researchers called the International Network Working Group (INWG). Set up in 1972 as an informal group to consider the technical issues involved in connecting different networks, later that year it became a subcommittee of the International Federation for Information Processing. [7] Koan's next puter. A more precise definition of a router is a computer networking device that interconnects separate logical subnets. Routers are now available in many types, though all are fundamentally doing the same job. A router is a computer whose software and hardware are usually tailored to the tasks of routing and forwarding, generally containing a specialized operating system (e.g. Cisco's IOS or Juniper Networks JunOS or Extreme Networks XOS), RAM, NVRAM, flash memory, and one or more processors. High-end routers contain many processors and specialized ASICs and do a great deal of parallel processing. However, with the proper software (such as XORP or Quagga), even commodity PCs can act as routers. Routers connect to two or more logical subnets, which do not necessarily map one-to-one to the physical interfaces of the router.[2]