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Chapter 17 Internetworking: Concepts, Architecture, and Protocols

Chapter 17 Internetworking: Concepts, Architecture, and Protocols. No single networking technology is best for all needs. Ethernet may be the best solution for connecting computers in an office, while a Frame Relay service may be the best way to interconnect sites in different cities.

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Chapter 17 Internetworking: Concepts, Architecture, and Protocols

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  1. Chapter 17 Internetworking: Concepts, Architecture, and Protocols • No single networking technology is best for all needs. Ethernet may be the best solution for connecting computers in an office, while a Frame Relay service may be the best way to interconnect sites in different cities.

  2. Universal Service • allows any pair of computers talk to each other. • However, bridging cannot be used to connect heterogeneous network technologies (eg. Token-ring & Ethernet) due to incompatible network, hardware, packet formats, and physical addressing scheme.

  3. Internetworking • providing universal service among heterogeneous networks. • The resulting system is known as an internetwork or internet. • Router is a special-purpose computer dedicated to interconnecting at least two networks that use different technologies, such as differing media, physical addressing schemes, or frame formats.

  4. Virtual network • an internet that provides universal service and the appearance of a single, seamless communication system to which many computers attach. • Users and application programs are not aware of the underlying physical networks or the routers that connect them since the internet protocol software hides the details of physical network connections, physical address, and routing information.

  5. TCP/IP Internet Protocol suite • the most widely used protocol for internetworking • used in global Internet

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