多选题Which two B-RAS service offerings maintain the analog dial-up model with centralized user authentication，authorization，andaccounting？（）ARouted1483BBridged1483CPPPoverATMDPPPoverEthernet
题目
多选题
Which two B-RAS service offerings maintain the analog dial-up model with centralized user authentication，authorization，andaccounting？（）
A
Routed1483
B
Bridged1483
C
PPPoverATM
D
PPPoverEthernet