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Eduncle posted an MCQ
February 22, 2020 • 14:35 pm 0 points
  • UGC NET
  • Computer Science & Applications

Consider a subnet with 720 routers. If a three-level hierarchy is chosen, with eight clusters, each containing 9 regions of 10 routers, then number of entries in hierarchical table of each router is 

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    Eduncle Best Answer

    Here In Routing table entries are according to 3-level Hierarchy.
    At Level 1 : All routers within the regions will store the address of all other routers. So total 10 entries.
    At Level 2 : Table entries will also include entries for all regions excepting itself. So, 8 entries will be there for Regions.
    At level 3 : Table entries will also include entries for all clusters excepting itself. So, 7 entries will be there for Regions.
    Total Entries in Routing Table = 10 + 8 + 7 = 25.

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