多项选择题 Which two factors affect the speed of your DSL connection?（）

单项选择题 Your ERX router is supporting 100 virtual routers.A specific line module supports IP interfaces in 5 virtual routers.How many routing tables are maintained on that module？（）

单项选择题 Beginning with software version 4-0-0.rel，how many virtual routers canbe configured on the ERX Edge Router？（）