Subnetting
Subnetting is a process of dividing large network into the smaller networks based on layer 3 IP address. IP-> 32bi t decimal number. written as four numbers between 1 and 255. divided into 5 classes . 0 [Zero] is reserved and represents all IP addresses. 127 is a reserved address and is used for testing, like a loop back on an interface. 255 is a reserved address and is used for broadcasting purposes. IP address has following parts- First 16 bits : NETWORK ID Next 8 bits : SUBNET ID Next 8 bits : HOST ID Subnet mask Subnet mask is a 32 bits long address used to distinguish between network address and host address in IP address. Subnet mask has only one purpose, to identify which part of an IP address is network address and which part is host address. Subnetting is a process of breaking large network in small networks known as subnets. Subnetting happens when we extend default boundary of subnet mask. Basically we borrow host bits...