|1) Not entirely sure just from context, but it sounds like you want Network.|
2) You should know this.
3) Probably the server in question, in which case you should know this.
4) Kerberos, unless you're running an NT4 domain. In which case your computer infrastructure needs to get out of the late 1990's.
These questions need to be answered AFTER you set up an AD account for the scanner.
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