BCMSN Exam Cram™ 2 (Exam Cram 642-811)

Summary

The main use of VLANs is to contain broadcasts. To move traffic between VLANs you need a Layer 3 device to route packets. End-to-end VLANs are used when devices always need to belong to the same VLAN no matter where the device is located—typically for security reasons. Local VLANs are geographically based and are used to break up broadcast domains. Local VLANs don't extend beyond a building's access and distribution layers. VLANs can be associated to a switch interface either dynamically or statically. Dynamic VLANs use a VMPS server to associate users to VLANs, but require a lot of upfront configuration. However, a user can be plugged in to a switch port anywhere in the network and be associated to the correct VLAN dynamically. Static ...