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Chapter 13 - Internet: A Network Of Networks
• Introduction • Network Technologies Are Incompatible • Coping With Incompatibility
– It is impractical, and may be economically infeasible, to require all computers in an enterprise to use the same network technology.
• Two Fundamental Concepts – A Connection to a Network can be Extended (dial-up
modem connection, dedicated modem connection, digital connection)
– A Computer Can Have Multiple Connections (multiple NICs)
Chapter 13 - Internet: A Network Of Networks
• Using A Computer To Interconnect Networks– Computers that interconnect networks are dedicated to the
interconnection task. Although they use conventional hardware, they run special-purpose software that starts automatically when the system is powered on and remains operating at all times.
• Interconnecting Computers Pass Packets • Interconnecting Computers Are Called Routers
(Gateways) • Routers Are The Building Blocks Of The Internet
– The Internet is not a conventional computer network. It consists of thousands of computer networks interconnected by dedicated special-purpose compters called routers.
Chapter 13 - Internet: A Network Of Networks
• Routers Accommodate Multiple Types Of Networks • Routers Can Interconnect WANs and LANs
• Interconnecting Networks Was Revolutionary • Terms
– fiber
– network of networks
– route
– router
– routing