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What can a network administrator utilize by using PPP Layer 2 encapsulation (Choose three.) （）。
- A、VLAN support
- B、compression
- C、authentication
- D、sliding windows
- E、multilink support
- F、quality of service
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BPDUB
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8B
6C
30D
32E
14F
16
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a synthetic network adapterB
an emulated network adapterC
virtual machine queue （VMQ）D
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