Question: In a Diameter overload control mechanism over the STa interface, what roles are assigned to the trusted non-3GPP access network and the 3GPP AAA server respectively?
Option 1: Trusted non-3GPP access network as Reporting Node, 3GPP AAA server as Reacting Node
Option 2: Trusted non-3GPP access network as Reacting Node, 3GPP AAA server as Reporting Node
Option 3: Both act as Reporting Nodes with the 3GPP AAA server having an additional Reacting Node role
Option 4: Both act as Reacting Nodes with the trusted non-3GPP access network having an additional Reporting Node role
Explanation: According to the recommended use of Diameter overload control, the trusted non-3GPP access network behaves as a reacting node (taking action based on received reports) and the 3GPP AAA server acts as a reporting node (sending reports about its status, such as being in an overload situation), allowing for effective management of overload situations.