SUBNET or Subnet Mask  What is it? + Operation ▷ 2020

You may never have heard of Subnet, especially if you are not a computer expert. However, here we are going to teach you a little about what it is, what it is for and how it works, taking into account that this is a tool that serves as mask for IP protocols.

And is that the subnet mask will allow you to identify which part of the IP address refers to the subnet to which it belongs. This means that thanks to this function you will have the opportunity to know many more details about what IP networks are, as well as what an IP address is and how to identify it.

In this way, here we are going to explain a little more about the subnet and how it works on the different internet protocols, as well as what are the subnetting addresses that you can currently find. To do this, follow in detail everything that we will teach you below.

What is the subnet and what is this netmask for in IP protocols?

It should be mentioned that this is a rather complicated and necessary process to networks around the world, and it should be mentioned that eThere are three types of network classes to which today we will call networks I, networks II and networks III. In the case of networks I, you can say that it is the internet manager, where well-known companies in the world such as Microsoft make use of them and which are also known as WAM or Wide Area Network.

In the case of the networks II, These are used especially by large companies and corporations but they are not as advanced as the WAM. They are called MAN Metropolitan Area Network where are they big enough not to be a LAN, but they are not big enough to become a WAM. And we finally found networks III, which are used by small and medium enterprises, and what is achieved in houses.

These are known as 192,168 … and they are named as LAN networks Local Area Network. Therefore, all this tool used to identify a part of an IP address, which lets you know a little more details of the IP address.

Taking into account that these addresses allow to identify a network interface that uses a IP protocol and which must be unique within said network. In addition, these protocols have different versions that are based on standards and that in IPv4 and IPv6 networks are currently compatible with each other, although migrating to IPv6 based on IETF RFC 3513 standards.

How does the subnet work in the different Internet protocols?

How does the subnet work in the different Internet protocols?

The subnet complies with a functioning in the different internet protocols as they are the IPv4 and IPv6.

That is why below we are going to explain in detail the process that is carried out in each of them:

In IPv4

In the case of IPv4 is the most widely used Internet protocol in every home, since despite the existence of IPv6 this protocol is not yet used by the majority of clients. And this is because ISPs have yet to make the leap to IPv6 addressing. All of this keeps making IPv4 remains one of the most fundamental protocols on the Internet.

The IPv4 protocol is the one who will allow to identify the different devices that are connected to the same network. These protocols have 32 bits, for what they exist at least 4.3 billion completely unique addresses, although many of them are alreadyThey are reserved to perform specific tasks, as they are the LAN private IP addressing ranges what they are not routable over the internet.

In IPv6

The other protocol currently available is the IPv6 and which has been created with the objective of being able replace the IPv4, but that has not yet managed to fully establish itself. In this case you are addresses are based on 128 bits. East protocol is much more extensive than the one mentioned above for what it is very difficult to define space with decimal notation.

IPv6 is conformed by eight 16-bit sections, which are separated by two points. Where each of the 16-bit sections have two raised to the 16 variations. An example of this would be IPv6: 2607; 4545; 200; f8ff; 67 cf. It is also worth mentioning that this protocol is being designed to replace IPv4 protocol.

What are reserved addresses in subnetting and what are they?

Another important aspect to consider are the addresses reserved in subnetting, where within each subnet cannot assign the first and last addresses to any host. This is due to that the first subnet address is used as the subnet address, while the last address is reserved for local broadcast domains. Thus, RFC 950 it can not use the first and last subnet.

In this way, here we explain the two reserved addresses that are currently found:

With RFC 950

The first address found is with RFC 950, where we leave you the following table:

Network Range
IP range
Broadcast – – – – 200.3 .25.159 – 1000-4000.120 –

Without RFC 950

The other available address is without RFC 950.

For this case we have the following data:

Network Range
IP range
Broadcast – – – – 200.3 .25.127 – – – – 200.3. 25.254

If you have any questions, leave them in the comments, we will answer you as soon as possible, and it will surely be of great help to more members of the community. Thank you! 😉

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