POLLING方式特点是（）。A、节约通道B、提高数据传送的速度C、容易实现RTU之间的同步D、能适应不同类型的通道结构E、容易实现通道自动切换
POLLING方式特点是（）。
- A、节约通道
- B、提高数据传送的速度
- C、容易实现RTU之间的同步
- D、能适应不同类型的通道结构
- E、容易实现通道自动切换
相关考题：
分布式RTU的主要特点是（）。A.结构简单紧凑；B.采用问答式（Polling)和循环式（CDT)；C.共用CPU、电源和使用并联芯线；D.主机CPU与各功能模板上微处理器各司其职，并通过计算机网络连接，
You are trying to change the polling parameters used by the location manager via the Cisco WCS， and yourrequest is being denied. What is wrong？（）A、Your login does not have the correct permissions.B、You must wait for the location server to become available.C、Polling values can be changed only on the location server.D、Polling values can be changed only in the maintenance window.
You are trying to change the polling parameters used by the location manager via the Cisco WCS，and your request is being denied. What is wrong？（）A、Polling values can be changed only in the maintenance window.B、Polling values can be changed only on the location server.C、Your login does not have the correct permissions.D、You must wait for the location server to become available.
Which three are benefits of U-APSD?（）A、synchronization of the transmission and reception of voice framesB、bandwidth reservationC、optimized power-save mode periodsD、increased call capacityE、priority bandwidth and polling
多选题Which of the following is reported in the LMI regular status polling？（）AAddition or Deletion of PVCBPVC status （active or inactive）CLink integrityDNone of the other alternatives apply
多选题Which three are benefits of U-APSD?（）Asynchronization of the transmission and reception of voice framesBbandwidth reservationCoptimized power-save mode periodsDincreased call capacityEpriority bandwidth and polling
判断题在远动信息的传送方式中，循环传送方式（CDT）比问答传送方式（Polling）接收遥信变位数据的可靠性高。A对B错