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CIDR notation can even be used with no IP address at all, e.g. when referring to a / 24 as a generic description of an IPv4 network that has a 24-bit prefix and 8-bit host numbers. For example: 198.51.100.14 / 24 represents the IPv4 address 198.51.100.14 and its associated network prefix 198.51.100.0 , or equivalently, its subnet mask 255.255 ...
A wildcard mask is a mask of bits that indicates which parts of an IP address are available for examination. In the Cisco IOS, [1] they are used in several places, for example:
This notation was introduced with Classless Inter-Domain Routing (CIDR). [2] In IPv6 this is the only standards-based form to denote network or routing prefixes. For example, the IPv4 network 192.0.2.0 with the subnet mask 255.255.255.0 is written as 192.0.2.0 / 24 , and the IPv6 notation 2001:db8:: / 32 designates the address 2001:db8:: and ...