Answer:
Sensing elements.
Explanation:
Sensing elements are the device which connect channels feedback and return it to the control system input. There are many sensors used for feedback control such as Tachometer, Encoders, Accelerometers and rate gyroscopes.
When a document repository is down when you attempt to access it, the ISA principle Authentication is being violated. The authentication method is done during the log on phase and is performed by the ISA server which requests certificate. <span>The client then needs to send the appropriate client certificate to the server in order to be authenticated and to have access to the document.</span>
Out of the following, the only one that I see is not the basic role of a webmaster is replying to customers questions about the web site! Usually they have a specific job for that; like customer service etc. Hopefully that helps.
