Computer Network Routing Algorithms
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Questions and Answers

Which routing protocol uses a composite metric that considers factors like bandwidth, delay, load, and reliability?

  • RIP
  • BGP
  • OSPF
  • IGRP (correct)

    • Which routing algorithm is known for its ability to adapt quickly to changes in network topology?

  • Static Routing
  • Link-State Routing
  • Dynamic Routing (correct)
  • Distance-Vector Routing

    • What is the maximum hop count allowed in RIP?

  • 15 (correct)
  • 5
  • 10
  • 20

    • Which routing protocol is commonly used for inter-autonomous system routing?

    <p>BGP</p> Signup and view all the answers

    Which routing algorithm utilizes Dijkstra's algorithm to calculate the shortest path?

    <p>OSPF</p> Signup and view all the answers

    Which of the following is NOT a characteristic of a good routing algorithm?

    <p>Limited routing table updates</p> Signup and view all the answers

    Which routing protocol utilizes link-state advertisements to build a network map?

    <p>OSPF</p> Signup and view all the answers

    What is the main difference between RIP and IGRP?

    <p>RIP uses a composite metric, while IGRP only considers hop count.</p> Signup and view all the answers

    Study Notes

    Routing Algorithms

    Routing algorithms are used to determine the best path for forwarding packets in a computer network.

    Types of Routing Algorithms

    • Static Routing: Manual configuration of routing tables by network administrators.
    • Dynamic Routing: Routers update their routing tables based on network topology changes.

    Distance-Vector Routing Algorithms

    • RIP (Routing Information Protocol):
      • Uses hop count as the metric.
      • Maximum hop count is 15.
      • Updates routing tables every 30 seconds.
    • IGRP (Interior Gateway Routing Protocol):
      • Uses a composite metric (bandwidth, delay, load, reliability).
      • More complex than RIP.
    • OSPF (Open Shortest Path First):
      • Uses link-state advertisements to build a topology map.
      • Calculates the shortest path using Dijkstra's algorithm.
      • Supports VLSM (Variable Length Subnet Masks) and CIDR (Classless Inter-Domain Routing).
    • IS-IS (Intermediate System to Intermediate System):
      • Similar to OSPF, but used in ISO networks.

    Hybrid Routing Algorithms

    • EIGRP (Enhanced Interior Gateway Routing Protocol):
      • Combines features of distance-vector and link-state protocols.
      • Uses DUAL (Diffusing Update Algorithm) to calculate the shortest path.

    Path Vector Routing Algorithms

    • BGP (Border Gateway Protocol):
      • Used for inter-autonomous system routing.
      • Uses AS (Autonomous System) numbers to identify networks.
      • Supports CIDR and VLSM.

    Routing Algorithm Characteristics

    • Convergence time: The time it takes for the network to adapt to topology changes.
    • Scalability: The ability of the algorithm to handle large networks.
    • Complexity: The level of difficulty in implementing and managing the algorithm.

    Routing Algorithms Overview

    • Determine optimal paths for forwarding packets in computer networks.

    Types of Routing Algorithms

    • Static Routing: Involves manual configuration of routing tables by network administrators, providing stable routes.
    • Dynamic Routing: Routers automatically update routing tables in response to changes in network topology.

    Distance-Vector Routing Algorithms

    • RIP (Routing Information Protocol):

      • Employs hop count as the routing metric.
      • Maximum allowable hop count is 15, limiting network size.
      • Updates its routing tables every 30 seconds to reflect changes.

    • IGRP (Interior Gateway Routing Protocol):

      • Utilizes a composite metric that factors in bandwidth, delay, load, and reliability.
      • More complex in comparison to RIP, catering to larger and varying network demands.

    • OSPF (Open Shortest Path First):

      • Builds a network topology map using link-state advertisements.
      • Calculates shortest paths employing Dijkstra's algorithm.
      • Supports VLSM (Variable Length Subnet Masks) and CIDR (Classless Inter-Domain Routing) for efficient IP addressing.

    • IS-IS (Intermediate System to Intermediate System):

      • Functions similarly to OSPF but is specifically designed for ISO networks.

    Hybrid Routing Algorithms

    • EIGRP (Enhanced Interior Gateway Routing Protocol):
      • Merges elements from both distance-vector and link-state protocols.
      • Utilizes DUAL (Diffusing Update Algorithm) for calculating the shortest path, enhancing efficiency and convergence.

    Path Vector Routing Algorithms

    • BGP (Border Gateway Protocol):
      • Facilitates routing amongst autonomous systems.
      • Uses Autonomous System (AS) numbers to identify individual networks in large-scale implementations.
      • Supports CIDR and VLSM for improved address space management.

    Routing Algorithm Characteristics

    • Convergence Time: Essential for measuring how quickly a routing algorithm adapts to changes in the network topology.
    • Scalability: Refers to the algorithm's capacity to accommodate growth in network size and complexity.
    • Complexity: Indicates the level of challenge in the implementation and operational management of the routing algorithm.

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    Description

    Learn about static and dynamic routing algorithms, including distance-vector routing algorithms like RIP, used to forward packets in computer networks.

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