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，   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？ （）

多项选择题 pany is implementing 802.1X in order to increase network security. In the use of 802.1X   access control，  which three protocols are allowed through the switch port before authentication  takes place？ （）

单项选择题 Refer to the exhibit.  What will happen to traffic within VLAN 14 with a source address of  172.16.10.5？（）