In the context of security in networking, the letters aaa in the term "aaa servers" stand for
allowing access automatically
accessing all appliances
access, applications, and accounting
authentication, authorization, and accounting

only #2 represents an object at rest on a table.

in #1, there is no normal force due to the table; the object is accelerating downward.

in #3, the vertical forces are not balanced; the object is accelerating downward.

in #4, neither the vertical nor the horizontal forces are balanced. the object is accelerating upwards and to the right.