VLAN is a most useful technology, which is often used in different network environments.
It is important for you to have a real understanding of the changes brought by VLAN.
Refer to the following statements about VLAN, which two are correct?
A. VLANs increase the size of collision domains.
B. VLANs allow logical grouping of users by function.
C. VLANs simplify switch administration.
D. VLANs enhance network security.
