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Which of the following is the wildcard translation of a /28 mask?
0.0.0.27
0.0.0.7
0.0.7.255
0.0.0.31
0.0.0.15
The subnet mask /28 represents 255.255.255.240. The wildcard mask is the inverse representation of the subnet mask, so 255-255=0 and 255-240=15 therefore the wildcard mask is 0.0.0.15. For more information refer to: http://www.cisco.com/c/en/us/support/docs/security/ios-firewall/23602-confaccesslists.html
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