From the course: Learning IP Addressing

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IPv4 address structure

IPv4 address structure

From the course: Learning IP Addressing

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IPv4 address structure

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- [Instructor] We have different ways of routing an IP version 4 address. If we write, for example, we've got an IP address of 10.1.2.3, well that's an address that we could communicate with, but that's not enough information to know what is the network portion of that address. What is the host portion of the address? To do that we've got to break it down and say where is that dividing line? To do that we can break it down into Binary numbering. Now, this is a non mathematical course where we're not going to get into Binary numbering, but here is if you were to use a Binary two decimal calculator. Here is what that IP address would look like in Binary. The 10, it breaks down into four zeros and a one zero one zero. The one has seven zeros and a one. The two has six zeros and a one zero. And the three has six zeros and a one one. And that dividing line is going to be our subnet mask. For example, if I have a subnet mask…

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