From the course: Cisco Networking Foundations: IP Addressing

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The need for subnetting

The need for subnetting

From the course: Cisco Networking Foundations: IP Addressing

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The need for subnetting

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- [Narrator] We know that Class A, B, and C IP version for networks have a default subnet mask, but sometimes we might want to change that default subnet mask, and that's called subnetting, when we're adding bits to that subnet mask. Let's take a look at a couple of reasons we might want to alter that default subnet mask. Consider, for example, a company with these two locations. We have router R1 at one site, router R2 at the other site, and these routers are interconnected with a dedicated line, and we need to assign IP addresses to these routers. And we're going to use the network of 192.0.2.0/24. We know it's a class C network we're dealing with because the value in the first doc is 192. And we know that a class C network has a default subnet mask of /24. So let's assign some IP addresses to these routers. We'll say that R1 is going to have an IP address of 192.0.2.1 and R2 is going to have an IP address of 192.0.2.2.…

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