Search results
Results from the WOW.Com Content Network
Creating a subnet by dividing the host identifier. A subnetwork, or subnet, is a logical subdivision of an IP network. [1]: 1, 16 The practice of dividing a network into two or more networks is called subnetting. Computers that belong to the same subnet are addressed with an identical group of its most-significant bits of their IP addresses.
A Class B network was a network in which all addresses had the two most-significant bits set to 1 and 0 respectively. For these networks, the network address was given by the next 14 bits of the address, thus leaving 16 bits for numbering host on the network for a total of 65 536 addresses per network.
CIDR is based on variable-length subnet masking (VLSM), in which network prefixes have variable length (as opposed to the fixed-length prefixing of the previous classful network design). The main benefit of this is that it grants finer control of the sizes of subnets allocated to organizations, hence slowing the exhaustion of IPv4 addresses ...
"IPv4 Addresses - the Complete Class A List". Infocellar. 5 April 2003. Archived from the original on 17 April 2011 "INTERNET PROTOCOL V4 ADDRESS SPACE". DonkBoy Internet. 30 June 2005; Cromwell, Bob (13 November 2008). "The /8 or Class A Networks". Bob Cromwell. Archived from the original on 17 December 2010
For example, an IPv4 address and its subnet mask may be 192.0.2.1 and 255.255.255.0, respectively. The CIDR notation for the same IP address and subnet is 192.0.2.1 / 24, because the first 24 bits of the IP address indicate the network and subnet.
Largest CIDR block (subnet mask) Host ID size Mask bits Classful description [Note 1] ... 16 contiguous class B networks 16-bit block: 192.168.0.0 – 192.168.255.255:
The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.
Because the protocol has no field for a subnet mask, the router assumes that all subnetwork addresses within the same Class A, Class B, or Class C network have the same subnet mask as the subnet mask configured for the interfaces in question. This contrasts with classless routing protocols that can use variable length subnet masks.