单项选择题
Switch A is configured with VLAN 105 and 106. Switch Bis configured with VLAN 105 and 107.Both switches are connected with a fiber cable. In order for packets from all VLANs to cross thefiber cable, which of the following configurations MUST be present? （）
A. Reverse ARP
B. Full duplex on the fiber link
C. PoE
D. 802.1q trunking
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A natural disaster has occurred and the administrator must return the network to a healthy status.Which of the following should the administrator do in this case?（）
A. Follow the emergency action plan.
B. Wait for an issue to be reported.
C. Establish a new baseline.
D. Determine if escalation is necessary. -
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Which of the following network devices would MOST likely be installed on a network to helpreduce broadcast traffic and to allow individual virtual networks?（）
A.Switch
B.Repeater
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单项选择题
Users report an intermittent degradation of sound on their IP phones. Which of the following woulda network administrator do to alleviate the problem?（）
A. Use plenum cables
B. Provide fault tolerance for the switch
C. Configure VLAN trunking on the switch
D. Configure QoS
