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Routers

Routers. Multiport connectivity device Can integrate LANs and WANs running at different transmission speeds and using a variety of protocols Routers operate at the Network layer (Layer 3) of the OSI Model. Router Features and Functions. Modular router

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Routers

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  1. Routers • Multiport connectivity device • Can integrate LANs and WANs running at different transmission speeds and using a variety of protocols • Routers operate at the Network layer (Layer 3) of the OSI Model

  2. Router Features and Functions • Modular router • Router with multiple slots that can hold different interface cards or other devices

  3. Router Features and Functions • Filter out broadcast transmission to alleviate network congestion • Prevent certain types of traffic from getting to a network • Support simultaneous local and remote activity

  4. Routing Protocols • To determine the best path, routers communicate with each other through routing protocols • In addition to its ability to find the best path, a routing protocol can be characterized according to its convergence time and bandwidth overhead • Convergence time • The time it takes for a router to recognize a best path in the event of a change or outage • Bandwidth overhead • Burden placed on an underlying network to support the routing protocol

  5. Router Features and Functions • Static routing • Technique in which a network administrator programs a router to use a specified paths between nodes • Dynamic routing • Automatically calculates best path between nodes and accumulates this information in a routing table • Hop • Term used in networking to describe each trip data take from one connectivity device to another

  6. Routing Protocols

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