Network ID & Host ID

 

                            Today we are talking in this lesson about what is a Network ID? What is a Host ID? And where they are sorted by class. When we classify Network ID and Host ID by class, we are mainly talking about Class "A", Class "B", and Class "C". The reason for that is that you remember that in the previous lesson we talked about five classes. Class "A", Class "B" and Class "C" is used to add the IP address for computers. That is the main reason for it. 

What is a Network ID... We use a Network ID to identify certain networks. Also, the Network ID does not change in the same network. We will talk about this further in the rest.

We use the Host ID to uniquely find the devices in the respective network. Remember that the Host ID of the same network changes. We will talk about this with examples in the future.

Okay, now let's see how to divide the Network ID and Host ID according to the class.

Before that, any IPv4 address you remember can be divided into Network ID and Host ID. You can understand further by looking at the diagram below.

Class "A"

We can separate the first 8Bit of a Class A IP Address as the Network ID and the other 24Bit as the Host ID.

Class "B" 

If you have seen our previous lessons, you know by now that we can find out if the IPv4 address we wrote is Class B by looking at the first 16 bits. In that case, we can separate the first 16 bits as the Network ID and the other 16 bits as the Host ID in Class "B".

Class "C"

In the case of a Class "C" IP Address, we already know that the first 24Bit Network ID can be separated from the other 8Bit Host ID.

This is how we find the Network ID and Host Id of an IPv4 Address.

You can understand this better by going here and watching this video.

Then we will meet another day with a valuable lesson like this.

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Good Luck 

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