单项选择题
A.CBWFQ B.CB-WRED C.LLQ D.Custom Queueing E.WRR Queueing
A.VLAN Trunk Protocol (VTP) B.State Synchronization Protocol (SSP) C.L2VPN D.Ethernet Virtual Switch Interface (VSI) E.Label Distribution Protocol (LDP)
A.9 LCCs B.7 LCCs C.10 LCCs D.6 LCCs E.8 LCCs