Class B subnetting.

Class B subnetting.

Class B subnetting:

In the case of networking, we need to select class-b if both its IP number and the number of network icons are equal. Let's see how to subnet Class B. When subnetting a Class B address, remember that the first two octet 3 bits in the mask must be 1. That is, the first 4-bit is the network and the next 16-bit is the host ID. The Class B default subnet mask is 255.255.0.0. In the case of Class B, we do a bit on the subnetting.

172.16.0.0/17 255.255.128.0 Network Number = 2 = 2 Host Number = 2-15-2= 32766 Subnet Id=256-128=128

Network-1	172.16.0.0	Network-2	172.16.128.0
Fast Host	172.16.0.1	Fast Host	172.16.128.1
	172.16.0.2		172.16.128.2
	172.16.0.3		172.168.128.3
Last Host	172.16.127.254	Last Host	172.16.255.254
Brad cost address	172.16.127.255	Brad cost address	172.16.255.255

Again, in the case of Class B, subnetting two bits on. 172.16.0.0/18 255.255.192.0 Network number 2 = 8 host number = 2 = -2 = 16382 subnet ID = 256-128

Network-3	172.16.128.0	Network-4	172.16.192.0
Fast Host	172.16.128.1	Fast Host	172.16.192.1
	172.16.128.2		172.16.192.2
	172.16.128.3		172.16.192.3
Last Host	172.16.191.254	Last Host	172.16.255.254
Brad cost address	172.16.191.255	Brad cost address	172.16.255.255