Early in this chapter, it was mentioned that you can determine the extent of a broadcast domain in a switched network without configuration files. How do you do it?
You can use a brute force approach where you systematically attach a traffic source on a port on a switch configured to generate broadcasts. With a network analyzer, you then check every port in the system to observe where the broadcast appeared. Every port where the broadcast is seen is a member of the same VLAN as the source. Then, you can move the source to a port not mapped in the first step and repeat the process until all ports are mapped.