Even though computer networks are diverse entities, a typical one includes end user
terminals or workstations coupled by an infrastructure which includes transmission network
and interconnecting devices. The transmission net work may include transmission media
such as optical? ber, wireless, wired, or similar communication media. The infra structure
may be as elaborate as the WWW (Worldwide Web) better known as the Intemet or as
simple as a local area network (LAN) using ethemet or token ring technology. The public …