Refer to the exhibit. The web servers WS_1 and WS_2 need to be accessed by external and  internal users. For security reasons， the servers should not communicate with each other，   although they are located on the same subnet. The servers do need， however， to communicate  with a database server located in the inside network.  What configuration will isolate the servers  from each other？ （）

• A、 The switch ports 3/1 and 3/2 will be defined as secondary VLAN community ports. The ports  connecting to the two firewalls will be defined as primary VLAN promiscuous ports.
• B、 The switch ports 3/1 and 3/2 and the ports connecting to the two firewalls will be defined as  primary VLAN promiscuous ports.
• C、 The switch ports 3/1 and 3/2 and the ports connecting to the two firewalls will be defined as  primary VLAN community ports.
• D、 The switch ports 3/1 and 3/2 will be defined as secondary VLAN isolated ports. The ports  connecting to the two firewalls will be defined as primary VLAN promiscuous ports.