Master of Your Own (Broadcast) Domain

Master of Your Own (Broadcast) Domain

To understand VLANs, you need to understand a few terms, starting with the term broadcast domain. A broadcast domain is a group of devices for which a broadcast frame sent by one device is received by all other devices in the same group.

Although the definition is rather formal, you've already read about all the underlying concepts, mainly in Chapter 6, "Reducing Congestion and Driving Faster on the Local (Network) Roadway." Figure 7-1 shows three examples of broadcast domains.