If you needed to transport traffic coming from multiple VLANs （connected between switches）， and your CTO was insistent on using an open standard，which protocol would you use？（）
- A、802.11B
- B、spanning-tree
- C、802.1Q
- D、ISL
- E、VTP
- F、Q.921
正确答案:C
答案解析:有
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