Dividing your network with subnets and virtual local area networks (VLANs)

- I'd like to talk about Subnets and VLANs.…Both of these are logical divisions of a network.…They allow us to take one network…and divide it into smaller parts…using different techniques.…A Subnet is a shortened way to say sub network,…and it's a part of the IP version four standard,…so IP4 supports multiple Subnets.…VLAN is an acronym.…It stands for virtual local area network…and it is typically going to be handled by a switch.…

So when we're talking about subnets…we need to talk about a Subnet Mask.…When you see an IP address…another piece of information is often presented,…and that is the Subnet Mask.…Lots of different subnet masks are possible,…but three of them are by far the most common.…These subnet masks are very common.…They're all a combination of the number 255…and the number zero and you'll notice…they're organized into four sections,…just like the IP address has four octets,…the subnet mask also has four octets…separated by periods.…

The subnet mask tells us which part…of the IP address is being used for the network,…