<span>A _superkey___ is any key that uniquely identifies each row.</span>
C is going to be your answer
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>
A cisco develops, manufactures and sells networking hardware, software, telecommunications equipment and other high-technology services and products. ... They pioneered the concept of a local area network (LAN) being used to connect geographically disparate computers over a multiprotocol router system.
Hope that helps.
These links should help u:
https://support.google.com/transparencyreport/answer/7347744?hl=en
https://searchengineland.com/most-censorship-and-content-takedown-requests-come-from-us-says-google-...