Which OSPF wildcard mask would be appropriate to use for the given network prefix?
- /30 and 0.0.0.2
- /13 and 0.7.255.255
- /23 and 0.0.2.255
- /18 and 0.0.64.255
Explanation: To calculate wildcard masks, follow these steps:
1. Change the subnet mask into dotted-decimal format.
2 Subtract the resulting mask from 255.255.255.255.
3. The result is the wildcard mask.
Example: A mask of /18 equals 255.255.192.0. A mask of 255.255.192.0 subtracted from
255.255.255.255 yields a wildcard mask of 0.0.63.255.
Exam with this question: CCNA 2 v5 Chapter 8: Check Your Understanding Questions Answers
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