Practice Quiz

Advanced Networking Administrator Test Prep

Category - CCNA

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Dave is trying to add a new router on an OSPF network. The networks attached to the new router do not appear in the routing tables of the other OSPF routers. The new router’s configuration is as follows:

Router(config)# router ospf 66
Router(config-if)# network 10.0.0.0 255.0.0.0 area 0

Which of the following could most likely be the issue?
  1. The process ID is configured incorrectly.
  2. The OSPF area is configured incorrectly.
  3. The network wildcard mask is configured incorrectly.
  4. The network number is configured incorrectly.
Explanation
Answer: C - The network wildcard mask is configured incorrectly.

Key Takeaway: In an OSPF configuration, you can choose the interface that is participating in an OSPF network. It provides better control during configuration; wildcards tell the router what you are actually trying to advertise. In this case, the wild card should have been 0.255.255.255, rather than 255.0.0.0.
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