What Are Wild Card Masks
Are used with the host/network address to tell the router a range of addresses to filter
Examples:
- to specify a host:
81.199.108.1 0.0.0.0
- to specify a small subnet:
81.199.108.8 – 81.199.108.15 (would be a /29)
- Block size is 8, and wildcard is always one number less than the block size
- Cisco access list then becomes: 81.199.108.8 0.0.0.7