多选题Which two of these are characteristics of Metro Ethernet? （）Aclass of serviceBbandwidth profilesCuser-network interfaceDEthernet LAN circuit attributesEEthernet virtual circuit attributes
多选题
Which two of these are characteristics of Metro Ethernet? （）
A
class of service
B
bandwidth profiles
C
user-network interface
D
Ethernet LAN circuit attributes
E
Ethernet virtual circuit attributes
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