One of the most questions is IP = 192.55.12.120 subnet mask = 255.255.25.240 Sub-network number and host number? Subscription: IP address: 192 55 12 120 11000000 00110111 00001100 01111000 Subnet mask: 255 255 255 240 1111111111 111111 11111111 11110000 Because it is 192, it can be known that this is a Class C address first three bytes are the network ID. I first explain the subnet mask: The subnet mask is a 32-bit number, which corresponds to the host address The part is 0 corresponds to the network address portion is all 1, and the subnet address is also 1 in this, which also includes a subnet division. For easy management. You can usually start in the host identity section. In this case, we can learn from 240 = 11110000, know that he uses the first four digits for subnet numbers to divide the host number to divide the host ID part of the subnet number And host number 0111 0000 is the subnet address is 112 0000 1000 for the host address is 8 soed: sub-network number: 0.0.0.112 host number: 0.0.0.8
