Network subdivision is a technique used to improve performance and security and help organize resources. Smaller networks also help with troubleshooting issues. In this lesson you will learn the two approaches todividing a network--VLANs and subnets. You will learn the concept of a virtual switch architecture and the use of trunking to connect VLAN nodes residing in different switches, how to setup VLAN’s and how to maintain them. We will also discuss and show an illustrated example on how to subnet networks using the concept of subnet mask.