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Cisco CCNA in 60 Days

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Day 39

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1. Area Border Routers (ABRs), facilitate inter-area routing by advertising summarised routing information between the different areas. This functionality allows for the following within the OSPF network: (choose all that apply)

Question 1 of 15

2. OSPF runs directly over Internet Protocol using IP protocol number __.

Question 2 of 15

3. In order to create a passive interface, which command would you add?

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4. Broadcast network types are those that natively support Broadcast and Multicast traffic, the most common example being _____.

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5. The OSPF Hello messages are used for neighbour discovery and to maintain ______ between neighbour routers.

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6. Cisco IOS software allows the default OSPF Hello timers to be changed using which command?

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7. OSPF can support multiple Network Layer protocols such as IPX and AppleTalk.

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8. By default, OSPF sends Hello packets every __  seconds on broadcast network types and a neighbour is declared “dead” if no Hello packets are received within four times the Hello interval, which is __ seconds.

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9. The OSPF adjacency enables the two routers to advertise summary ____ information to each other.

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10. After the OSPF network [network] [wildcard] area [area id] command has been issued, the router sends out Syn packets on interfaces matching the specified network and wildcard mask combination and attempts to discover neighbours.

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11. The OSPF [process id] keyword is globally significant and needs to be the same on all routers in the network in order to establish an adjacency.

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12. Each OSPF process maintains its own separate Link State Database; however, all routes are entered into the same IP routing table. In other words, there is no unique IP routing table for each individual OSPF process configured on the router.

Question 12 of 15

13. The most common example of a Non-Broadcast network type is Frame Relay.

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14. Following the OSPF database exchange, the ___ algorithm runs and creates a shortest-path tree to all hosts in an area or in the network backbone, with the router that is performing the calculation at the root of that tree.

Question 14 of 15

15. The wildcard mask for OSPF can also be entered in the same format as a traditional subnet mask, for example, network 10.0.0.0 255.0.0.0 area 0.

Question 15 of 15