Converting an ACL Filter with Wildcard Mask 0.0.1.255 to a Range of IP Addresses

Which IPv4 address range covers all IP addresses that match the ACL filter specified by 172.16.2.0 with wildcard mask 0.0.1.255?

The ACL filter specified as 172.16.2.0 with a wildcard mask of 0.0.1.255 can be converted to a range of IP addresses using the following steps:

1. Convert the wildcard mask to its binary form: 0.0.1.255 becomes 00000000.00000000.00000001.11111111.

2. Determine the network address by performing a bitwise AND operation between the ACL filter and the inverse of the wildcard mask. In this case, the inverse of 00000000.00000000.00000001.11111111 is 11111111.11111111.11111110.00000000, so the network address is 172.16.2.0.

3. Determine the broadcast address by performing a bitwise OR operation between the network address and the wildcard mask. In this case, the broadcast address is obtained by ORing 172.16.2.0 with 00000000.00000000.00000001.11111111, resulting in 172.16.3.255.

Therefore, the range of IP addresses covered by the ACL filter 172.16.2.0 with wildcard mask 0.0.1.255 is from 172.16.2.0 to 172.16.3.255.

More Answers:
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Understanding Access Control Lists (ACLs) in IPv6: The Power of Prefix-Lists for Traffic Control and Routing
Understanding ACL Matching Range: How the access-list 1 permit 172.16.0.0 0.0.15.255 Statement Works

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