CCNA®: Cisco® Certified Network Associate: Fast Pass, Third Edition

2.3. Explain network segmentation and basic traffic management concepts

There are a number of interchangeable terms we can use for "LAN," depending on the context. They include:

• Broadcast domain (in the context of layer 2 vs. layer 1 segmentation)

• Subnet or network (in the context of IP networking)

• Data Link (layer 2 in the OSI model)

• VLAN (in the context of creating broadcast domains in switched Ethernet environments)

As was mentioned, these terms are roughly equivalent. They are used to describe the simple LAN in different contexts. Why discuss a simple LAN? Well, it is the basis of every internetwork. An internetwork is simply a collection of connected LANs. An individual LAN is created using a variety of devices and techniques, such as. These ...