Discussion :: Computer Networking
- You need to create an access list that will prevent hosts in the network range of 192.168.160.0 to 192.168.191.0. Which of the following lists will you use?
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A.
access-list 10 deny 192.168.160.0 255.255.224.0 |
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B.
access-list 10 deny 192.168.160.0 0.0.191.255 |
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C.
access-list 10 deny 192.168.160.0 0.0.31.255 |
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D.
access-list 10 deny 192.168.0.0 0.0.31.255 |
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Answer : Option C
Explanation :
The range of 192.168.160.0 to 192.168.191.0 is a block size of 32. The network address is 192.168.160.0 and the mask would be 255.255.224.0, which for an access list must be a wildcard format of 0.0.31.255. The 31 is used for a block size of 32. The wildcard is always one less than the block size.
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