The Company security administrator is concerned with VLAN hopping based attacks.
Which two  statements about these attacks are true？ （）

A. Attacks are prevented by utilizing the port-security feature.
B. An end station attempts to gain access to all VLANs by transmitting Ethernet frames in the  802.1q encapsulation.
C. Configuring an interface with the switchport mode dynamic command will prevent VLAN  hopping.
D. An end station attempts to redirect VLAN traffic by transmitting Ethernet frames in the 802.1q  encapsulation.
E. Configuring an interface with the "switchport mode access" command will prevent VLAN  hopping.