多项选择题

Which two benefits are provided by creating VLANs? （）

A.added security
B.dedicated bandwidth
C.provides segmentation
D.allows switches to route traffic between subinterfaces
E.contains collisions

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Which of the following are key characteristics of PPP (Choose three.)（）。

A.can be used over analog circuits
B.maps Layer 2 to Layer 3 address
C.encapsulates several routed protocols
D.supports IP only
E.provides error correction

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Which three elements must be used when you configure a router interface for vlan trunking？（）

A.one IP network or subnetwork for each subinterface
B.subinterface numbering that matches vlan tages
C.subinterface encapsulation identifiers that match vlan tags
D.a management domain for each subinterface
E.one physical interface for each subinterface
F.one subinterface per vlan

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Which two benefits are provided by using a hierarchical addressing network addressing scheme? （）

A.reduces routing table entries
B.auto-negotiation of media rates
C.efficient utilization of MAC addresses
D.dedicated communications between devices
E.ease of management and troubleshooting