What user-controllable security mechanism is built into OSSV?

Due to the sensitive nature of AutoSupport messages, what transport protocol should a storage administrator configure?

Node 1 in a clustered pair detects that it has lost connectivity to one of its disk shelves. Node 1 is still up, but it cannot see one of its disk shelves. However, the partner node, Node 2, can see all of Node 1s disk shelves.
Which one of the following features will cause Node 2 to monitor this error condition for a period of three minutes (by default), and then forcibly take over Node 1 if the error condition persists?

Which ONTAP feature combines multiple writes into a single 4K block on the aggregate?

Which one of the following does SnapRestore revert?