Which of the following statements about VLAN are NOT true? (the number of correct answers: 3) Score 1

Which of the following statements about VLAN are NOT true? (the number of correct answers: 3) Score 1
A . users in different VLAN can connect each other directly without pre-configuration
B . different VLAN means different physical location of switches
C . VLAN configuration can be done through an TCP/IP router device
D . VLAN can enhance the network security and data isolation

Answer: A,B,C