判断题 对于40波以上至160波的超大容量传输，ZXWM M900的光放大部平台对C波段和L波段分别同时放大

单项选择题 The ZXMP M900 is applicable to ultra long-haul transmission and the system reach can be up to （） at the maximum 。

单项选择题 In a ZXMP M800 system using 100M monitoring, the order-wire and protection switching commands are delivered to related network elements of multicast groups. Each system has a maximum of （） multicast groups.