Validating ip address
Classful network design allowed for a larger number of individual network assignments and fine-grained subnetwork design.The first three bits of the most significant octet of an IP address were defined as the class of the address.
Depending on the class derived, the network identification was based on octet boundary segments of the entire address.
netmask), and in the technical jargon used in network administrators' discussions.
Early network design, when global end-to-end connectivity was envisioned for communications with all Internet hosts, intended that IP addresses be uniquely assigned to a particular computer or device.
CIDR is based on variable-length subnet masking (VLSM) to allow allocation and routing based on arbitrary-length prefixes.
Today, remnants of classful network concepts function only in a limited scope as the default configuration parameters of some network software and hardware components (e.g.