Computer Network Mcqs

Page No. 58

In OSPF database descriptor packet, which field is used to detect a missing packet?


a LSA header

✖


bMS

✖


cDatabase descriptor sequence number

✓


dOptions

✖



in OSPF database descriptor packet, which field is used to indicate that the router is master?


aM

✖


b MS

✓


c I

✖


dOptions

✖


View Answer MS

In OSPF database descriptor packet, if there are more database descriptor packets in the flow, ‘M’ field is set to ____________


a 1

✓


b0

✖


cmore

✖


d-1

✖


View Answer 1

In OSPF header, which field is used to detect errors in the packet?


a Type

✖


b Area ID

✖


cAuthentication type

✖


d Checksum

✓


View Answer Checksum

What is the correct order of the operations of OSPF? i – Hello packets ii – Propagation of link-state information and building of routing tables iii – Establishing adjacencies and synchronization of database


ai-ii-iii

✖


bi-iii-ii

✓


c iii-ii-i

✖


d ii-i-iii

✖


View Answer i-iii-ii

Which of the following is not a type of OSPF packet?


aHello

✖


b Link-state request

✖


cLink-state response

✓


dLink-state ACK

✖


View Answer Link-state response

In OSPF, which protocol is used to discover neighbour routers automatically?


aLink state protocol

✖


bError-correction protocol

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cRouting information protocol

✖


dHello protocol

✓


View Answer Hello protocol

Which of the following is false with respect to the features of OSPF?


aSupport for fixed-length subnetting by including the subnet mask in the routing message

✓


bMore flexible link cost than can range from 1 to 65535

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cUse of designated router

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dDistribution of traffic over multiple paths that have equal cost to the destination

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The computation of the shortest path in OSPF is usually done by ____________


aBellman-ford algorithm

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bRouting information protocol

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cDijkstra’s algorithm

✓


d Distance vector routing

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Open Shortest Path First (OSPF) is also called as _____________


a Link state protocol

✓


bError-correction protocol

✖


cRouting information protocol

✖


dBorder gateway protocol

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