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多选题
What are four uses of the USB ports in the Cisco integrated services routers?（）
A
Increase RAM Memory for the Router
B
Secure Configuration Files Distribution
C
Storage of Removable Credentials
D
Remote Administration
E
Secure Device Authentication
F
Bulk Flash storage
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单选题How dose a DHCP server dynamically assign IP address to host?（）A
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多选题When a DHCP server is configured, which two IP addresses should never be assignable to hosts?（）Anetwork or subnetwork IP addressBbroadcast address on the networkCIP address leased to the LANDIP address used by the interfacesEmanually assigned address to the clientsFdesignated IP address to the DHCP server
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The denied MAC addresses have already been learned or confgured on another secure interface in the same VLAN.B
The denied MAC address are statically configured on the port.C
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单选题What is one benefit of PVST+？（）A
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PVST+automatically selects the root bridge location，to provide optimiz…C
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