Practice Example #5B: 255.255.255.0 (/24)
Written on 23:21 by Ahmet Emir
Contrary to accustomed belief, 255.255.255.0 acclimated with a Class B adjustment address is not declared a
Class B adjustment with a Class C subnet mask. It’s amazing how abounding bodies see this affectation used
in a Class B adjustment and ahead it’s a Class C subnet mask. This is a Class B subnet affectation with
8 $.25 of subnetting—it’s appreciably adapted from a Class C mask. Subnetting this address is
fairly simple:
172.16.0.0 = Adjustment address
255.255.255.0 = Subnet mask
Subnets? 28 = 256.
Hosts? 28 – 2 = 254.
Authentic subnets? 256 – 255 = 1. 0, 1, 2, 3, etc., all the way to 255.
Broadcast address for ceremony subnet?
Authentic hosts?
The after table shows the ancient four and aftermost two subnets, the authentic hosts, and the
broadcast addresses in a Class B 255.255.255.0 mask:
Subnet 0.0 1.0 2.0 3.0 ... 254.0 255.0
First host 0.1 1.1 2.1 3.1 ... 254.1 255.1
Last host 0.254 1.254 2.254 3.254 ... 254.254 255.254
Broadcast 0.255 1.255 2.255 3.255 ... 254.255 255.255
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