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| Question ID 16063 | Which characteristics are representatives of a link-state routing protocol? (Choose three.)
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| Option A | provides common view of entire topology
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| Option B | exchanges routing tables with neighbors
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| Option C | calculates shortest path
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| Option D | utilizes event-triggered updates
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| Option E | utilizes frequent periodic updates
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| Correct Answer | A,C,D |
Explanation Explanation: Each of routers running link-state routing protocol learns paths to all the destinations in its area so we can say although it is a bit unclear. Link-state routing protocols generate routing updates only (not the whole routing table) when a change occurs in the network topology so Link-state routing protocol like OSPF uses Dijkstra algorithm to calculate the shortest path - >. Unlike Distance vector routing protocol (which utilizes frequent periodic updates), link-state routing protocol utilizes event-triggered updates (only sends update when a change occurs) ->.
| Question ID 16064 | Routing has been configured on the local router with these commands:
Local(config)# ip route 0.0.0.0 0.0.0.0 192.168.1.1
Local(config)# ip route 10.1.0.0 255.255.255.0 192.168.2.2
Local(config)# ip route 10.1.0.0 255.255.0.0 192.168.3.3
Drag each destination IP address on the left to its correct next hop address on the right.
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| Option A | Answer :
Explanation:
If we have many entries matching for next hop ip address then the router will choose the one with most specific path to send the packet. This is called the longest match rule, the route with the most bits in the mask set to 1 will be chosen to route packet.
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| Correct Answer | A |
Explanation