1. Introduction         Computer and telephone networks inflict a gigantic impact on today's society. From letting you call John in Calgary to letting you make a withdraw at your friendly ATM machine they control the flow of information. But today's complicated and expensive networks did not start out big and complicated but rather as a wire and two terminals back in 1844. From these simple networks to the communication giants of today we will look at the evolution …showed first 75 words of 3582 total…

…showed last 75 words of 3582 total…second as well as 1.544 megabits per second. Another type of LAN to LAN connections are packet switching networks. These are services that a network router calls up on a digital line. They consist of a group of packet switches that are connected via intraswitch trunks (usually fiber optic) that relay addressed packets of information between them. Once the packet reaches the destination packet switch, it sends it via another digital connection to the receiving router.