You are configuring an autonomous wireless guest network for your customer. The customer requires that guest users be unable to communicate with one another. Which solution best meets this requirement? 

Answer options:

A. public secure packet forwarding on the AP and switch-port protected on the AP switch port
B. public secure packet forwarding on the AP and limiting the AP switch port to the guest VLAN only
C. port security on the AP and 802.1X on the AP switch port
D. MAC filtering on the AP radio interface and switch-port protected on the AP switch port
E. public secure packet forwarding on the AP and configuring the guest VLAN on the switched network as a private VLAN

E