A prefix-list on Cisco IOS is similar to an access-list with the exception that prefix-lists allow some options that access-list don’t. Access-lists allow you to match specific networks or subnets but that’s it. Prefix-lists support the ge (greater) and le (less) operators, allowing you to match on networks or subnets that have a certain prefix length that is greater or smaller than a certain value. These lessons cover examples where prefix-lists are used.