Network Foundation--IP Addressing

There are class addressing and no-class addressing

Subnets and can be turned into subnet masks (VLSM)

Sub-grid: If the Class B is divided into Class C, Class A is divided into Class B, the address of the class addressing is mesh into a subnet where all masks are consistent. The address space is the same size.

Variable eldest son netmask: The size of the divided address space is inconsistent, and a network number can have a different mask. VLSM needs to be run in a non-class network, the relevant protocols and software in the network need to support the non-class addressing.

Subnets and VLSM are all designed to make better use of address space.

Description: The mask is used to identify the IP address of the network number and host number, 1 represents the network number, 0 for the host number

CIDR non-class inter-domain routing: The IP network number prefix is unlimited, you can aggregate a class address into a network or CIDR block, or you can divide the class address into VLSM subnets.

Summary: There are class addressing, no class addressing, sub-network, variable eldest son netmask, CIDR and other technologies are to solve the problem of efficient, flexible use of limited IPV4 32-bit address space.

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Network Foundation--IP Addressing