单项选择题
A.snmp-client
B.snmp-server
C.snmp-clientenable
D.snmp-serverenable
单项选择题 Where does Layer2 de-encapsulation occur on the ERX Edge Router？（）
单项选择题 The primary line module has failed and the spare line module is nowactive.What occurs，by default，when the primary line module returns to an operational status？（）
多项选择题 Which three CLI modes are available on the ERX Edge Router？（）