单项选择题 In a Routed 1483 network, a provider doesnt want to configure static routes for its customer networks. Which command allows the ERX to obtain the framed route stored on the RADIUS server?（）

单项选择题 When configuring the router to support dynamic PPPoE interfaces, which command string controls the number of sessions supported?（）

单项选择题 Which configuration command permits dynamic detection of the ATM frame format?（）