Subnetting
Assuming you take a gander at the table above, it can seem like the number of IP addresses is for all intents and purposes limitless. All things considered, there are practically 4.2 billion potential IPv4 addresses accessible.

In any case, on the off chance that you contemplate how much the web has developed, and the number of additional gadgets that are associated nowadays, it probably won’t shock you to hear that there’s now a lack of IPv4 addresses.

Since the deficiency was perceived quite a while back, engineers concocted a method for separating an IP address into more modest networks called subnets.

This cycle, called subnetting, utilizes the host part of the IP address to separate it into those more modest networks or subnets.

Subnet Masks Work
Subnet masks capability as a kind of channel for an IP address. With a subnet mask, gadgets can take a gander at an IP address, and sort out what parts are the network bits and which are the host bits.

Then, at that point, utilizing those things can sort out the most ideal way for those gadgets to convey.

In the event that you’ve looked around the network settings on your switch or computer, you’ve probably seen this number: 255.255.255.0.

Provided that this is true, you’ve seen an exceptionally normal subnet mask for basic home networks.

Like IPv4 addresses, subnet masks are 32 bits. Furthermore, very much like converting an IP address into paired, you can do exactly the same thing with a subnet mask.

Class A

Class B

Class C

Class D

Class A IP Addresses Network Bits Subnet Mask Number of Subnets Number of Hosts

Class B IP Addresses Network Bits Subnet Mask Number of Subnets Number of Hosts

Supernetting (CIDR) Chart CIDR – Classless Inter-Domain Routing. Note: The Number of Class C networks must be contiguous. For example, 192.169.1.0/22 represents the following block of addresses: 192.169.1.0, 192.169.2.0, 192.169.3.0 and 192.169.4.0. Class C CIDR Block Supernet Mask Number of Class C Addresses Number of Hosts