Subnetting Convenance Examples: Class C Addresses
Written on 15:36 by Ahmet Emir
Here’s your befalling to convenance subnetting Class C addresses application the adjustment I just
described. Exciting, isn’t it! We’re activity to alpha with the aboriginal Class C subnet affectation and work
through every subnet that we can application a Class C address. When we’re done, I’ll appearance you how
easy this is with Class A and B networks too!
Practice Archetype #1C: 255.255.255.128 (/25)
Since 128 is 10000000 in binary, there is alone 1 bit for subnetting and 7 $.25 for hosts. We’re
going to subnet the Class C arrangement abode 192.168.10.0.
192.168.10.0 = Arrangement address
255.255.255.128 = Subnet mask
Now, let’s acknowledgment the big five:
How abounding subnets? Since 128 is 1 bit on (10000000), the acknowledgment would be 21 = 2.
How abounding hosts per subnet? We accept 7 host $.25 off (10000000), so the blueprint would
be 27 – 2 = 126 hosts.
120 Chapter 3 Subnetting, VLSMs, and Troubleshooting TCP/IP
What are the accurate subnets? 256 – 128 = 128. Remember, we’ll alpha at aught and calculation in
our block size, so our subnets are 0, 128.
What’s the advertisement abode for anniversary subnet? The cardinal appropriate afore the amount of the
next subnet is all host $.25 angry on and equals the advertisement address. For the aught subnet,
the abutting subnet is 128, so the advertisement of the 0 subnet is 127.
What are the accurate hosts? These are the numbers amid the subnet and broadcast
address. The easiest way to acquisition the hosts is to abode out the subnet abode and the broadcast
address. This way, the accurate hosts are obvious. The afterward table shows the 0 and
128 subnets, the accurate host ranges of each, and the advertisement abode of both subnets:
Before affective on to the abutting example, booty a attending at Figure 3.1. Okay, attractive at a
Class C /25, it’s appealing bright there are two subnets. But so what—why is this significant?
Well actually, it’s not, but that’s not the appropriate question. What you absolutely appetite to apperceive is
what you would do with this information!
If you enjoyed this post Subscribe to our feed