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After how many time ticks, will L's distance vector (i.e., its DV that it exchanges with its neighbor) reflect this change in topology?

After how many time ticks, will L's distance vector (i.e., its DV that it exchanges with its neighbor) reflect this change in topology?

C++ for Engineers and Scientists
C++ for Engineers and Scientists
4th Edition
ISBN:9781133187844
Author:Bronson, Gary J.
Publisher:Bronson, Gary J.
Chapter13: Structures
Section: Chapter Questions
Problem 4PP
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After how many time ticks, will L's distance vector (i.e., its DV that it exchanges with its neighbor) reflect this change in topology?

 

5.06-4. Bellman Ford Algorithm (3, part 4). Consider again the same network shown above and again focus on node L. All links have a cost of 1. [Note: You can find more examples of problems similar to this here.] Suppose that at time t, the distance vector calculations have completed in all nodes. The link between nodes S and N then goes down at time t. Assuming that all nodes exchange distance vectors (DV)s at times t+1, t+2, (i.e., a clock tick is one time unit)... immediately recompute their DVs and if they transmit a new DV do so at the next integer time value. After how many time ticks, will L's distance vector (i.e., its DV that it exchanges with its neighbor) reflect this change in topology? O After 1 time tick. O After 2 time ticks. O After 8 time ticks - roughly the diameter of the network. O Four time ticks. O L's distance vector will not change so it will not send out a change in DV message - i.e., the algorithm will not iterate.
Transcribed Image Text:5.06-4. Bellman Ford Algorithm (3, part 4). Consider again the same network shown above and again focus on node L. All links have a cost of 1. [Note: You can find more examples of problems similar to this here.] Suppose that at time t, the distance vector calculations have completed in all nodes. The link between nodes S and N then goes down at time t. Assuming that all nodes exchange distance vectors (DV)s at times t+1, t+2, (i.e., a clock tick is one time unit)... immediately recompute their DVs and if they transmit a new DV do so at the next integer time value. After how many time ticks, will L's distance vector (i.e., its DV that it exchanges with its neighbor) reflect this change in topology? O After 1 time tick. O After 2 time ticks. O After 8 time ticks - roughly the diameter of the network. O Four time ticks. O L's distance vector will not change so it will not send out a change in DV message - i.e., the algorithm will not iterate.
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