CHAPTER 13. VLANs
It is not enough for a Cisco Certified Network Associate (CCNA) to just be able to configure and maintain the switches in a network environment; they also need to be able to make the network efficient and secure as possible. This can be accomplished by using virtual local area networks (VLANs). VLANs allow network administrators to divide the network by designating certain ports as part of a logical network. Although several computers or devices can be connected to the same physical network, they can be all separated logically through the use of a VLAN.
CCNAs are not the only ones who need to be aware of VLANs and their impact on the network, whereas other individuals in the computer industry, such as computer forensic ...