多項選擇題

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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多項選擇題

Which of the following describes the roles of devices in a WAN?（）

A. A CSU/DSU terminates a digital local loop
B. A modem terminates a digital local loop
C. A CSU/DSU terminates an analog local loop
D. A modem terminates an analog local loop
E. A router is commonly considered a DTE device
F. A router is commonly considered a DCE device

多項選擇題

Which of the following are key characteristics of PPP?（）

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