Distance Vector Routing in Computer Networks
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Questions and Answers

What is the basis of the calculation in network measurements, according to distance vector routing?

  • Hop count and link delay
  • Router's idle time and packet size
  • Network congestion and packet loss
  • Bandwidth, delay, and link queue lengths (correct)

    • How do adjacent routers exchange information in distance vector routing?

  • Using a hierarchical routing system
  • By broadcasting to all routers
  • Through centralized servers
  • By exchanging distance vector tables (correct)

    • What happens when a router receives vectors from its neighboring routers in distance vector routing?

  • It waits for a convergence period
  • It updates its routing table immediately
  • It ignores the information and uses its current routes
  • It adds the delay to the neighbor in each case and chooses the best route (correct)

    • What is the problem that occurs when routes take a long time to settle down in a network, causing infinite delay values?

    <p>Count to infinity problem</p> Signup and view all the answers

    What is the term for the time it takes for routes to be discovered and settled in a network?

    <p>Convergence time</p> Signup and view all the answers

    How does link delay get measured in distance vector routing?

    <p>By timing echo packets between adjacent routers</p> Signup and view all the answers

    What is the main issue in the scenario described above?

    <p>A routing loop is created due to the relaying of paths back to a neighbour who sent them.</p> Signup and view all the answers

    What is the solution to the problem described above known as?

    <p>Split Horizon</p> Signup and view all the answers

    In the scenario above, what happens to the packet when the R2-to-R3 link fails?

    <p>The packet is sent back to R1 because the R2 router advertised a viable network path.</p> Signup and view all the answers

    What is the purpose of Split Horizon?

    <p>To prevent routing loops by not relaying paths back to a neighbour who sent them.</p> Signup and view all the answers

    What is the consequence of the R2 router relaying paths back to R1?

    <p>A routing loop is created.</p> Signup and view all the answers

    What is the main cause of the routing loop in the scenario above?

    <p>The relaying of paths back to a neighbour who sent them.</p> Signup and view all the answers

    What is the primary requirement for routers in link state routing?

    <p>To know the delay or cost to neighbours</p> Signup and view all the answers

    Why is packet size limited in a subnet?

    <p>Due to constraints imposed by the hardware</p> Signup and view all the answers

    What is the purpose of Dijkstra's SPT algorithm in network routing?

    <p>To calculate the shortest path to all other nodes</p> Signup and view all the answers

    What happens to the link state data in a network?

    <p>It is flooded throughout the network</p> Signup and view all the answers

    What is a consequence of large packet sizes in a network?

    <p>Long queuing delays in routers</p> Signup and view all the answers

    What is the outcome of the routing process described in the text?

    <p>The discovery of the shortest path to all nodes</p> Signup and view all the answers

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