Computer Network - IP Addressing

An IP address defines unique address of a device over a network.An IP address is a 32 Byte address and is divided into various classes namely Class A, Class B, Class C, Class D and Class E.In Classless addressing, network address field can extend further to Host Id field.Subnetting allows one to create multiple logical networks within a single Class A, B, or C address based network.A subnet mask is a 32-bit IP address, when bit-wise ANDed with given IP address provides with the address required to identify a subnet.CIDR makes use of VLSM to allocate IP addresses to sub nets depending upon the need of the organization.
Routing devices on the Internet discard any IP data gram or packet using private IP addresses
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A Loop-back address is a test address which acts as a test mechanism of network devices and protocols.IPv6 implements 128-bit network in contrast to 32-bit IP address used by IPv4.

Mobile IP allows mobile devices to move from one network to another while maintaining the connectivity to the Internet.

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