多选题下列对于PE和CE的描述的正确是（）。ACE路由器：为放在客户侧的路由器，用来和客户的设备进行对接BPE路由器：为放置在运营商侧的路由器，用来和CE路由器进行对接CCE只能放在客户侧和运营商侧DCE和PE可用随意放置
多选题
下列对于PE和CE的描述的正确是（）。
A
CE路由器：为放在客户侧的路由器，用来和客户的设备进行对接
B
PE路由器：为放置在运营商侧的路由器，用来和CE路由器进行对接
C
CE只能放在客户侧和运营商侧
D
CE和PE可用随意放置
参考解析
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