【单项选择题】
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，  <br /> although they are located on the same subnet. The servers do need， however， to communicate  with a database server located in the inside network.<br />  What configuration will isolate the servers  from each other？ （）<br /> <img src="https://img.ppkao.com/2018-07/gelingxia/2018073010512580649.jpg" /><p> Refer to the exhibit. The web servers WS_1 and WS_2 need to be accessed by external and 
A、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、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、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、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.
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