问题:
A . AutoQoS is supported on Frame Relay multipoint subinterfaces.
B . AutoQoS is supported on low-speed ATM PVCs in point-to-point subinterfaces.
C . AutoQoS is supported on serial PPP and HDLC interfaces.
D . AutoQoS is supported only on Frame Relay main interfaces and not on any subinterface configuration.
● 参考解析
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