单项选择题 PON的定义是()

单项选择题 ODN是指从()之间的光纤链路，ODN不是广义上的接入光()

单项选择题 以下哪个ONU可以承载TDM业务()

单项选择题 如果C类子网的掩码为255.255.255.224，则包含的子网位数、子网数目、每个子网中主机数目正确的()A.3，6，30B.4，14，14C.2，2，62D.5，30，6

单项选择题 以下是GPON设备日常维护中某工程师抓取的2段操作日志。isadmin>#showvlanshub-fdb===========================================================shub-fdbtable===========================================================vlanid|mac|bridge-port|status------+-----------------+------------------+-------------------------------------------------------10000:0e:86:1c:19:e1control-portlearned10000:18:82:46:c9:1cnetwork:1learned20000:18:82:46:c9:1cnetwork:1learned20000:1f:a3:3d:3d:76lt:1/1/1learned20100:12:3f:12:f5:calt:1/1/1learned20100:18:82:46:c9:1cnetwork:1learned20100:1f:a3:3d:3e:22lt:1/1/1learned30000:12:3f:12:f5:calt:1/1/1learned30000:18:82:46:c9:1cnetwork:1learned30000:19:21:6d:3f:97lt:1/1/1learned30000:19:d1:ea:a6:adlt:1/1/1learned30000:f0:4c:8b:09:a0lt:1/1/1learned---------------------------------------------------------------------------------------------------shub-fdbcount:12===========================================================XIGU70-01-0116:01:38M0COMPLD/*RTRV-PONFDBDYNAMIC::ALL:::*/'PONVLAN-200:00-1f-a3-3d-3d-76,BRGPORT-1-1-1-1-4-1-2''PONVLAN-201:00-1f-a3-3d-3e-22,BRGPORT-1-1-1-1-5-1-2''PONVLAN-300:00-f0-4c-8b-09-a0,BRGPORT-1-1-1-1-4-1-1'根据以上信息可知：抓取日志的设备可能属于：()