Answer sender - The handler of the request is also the sender of the answer. The answer sender uses the priority information received in the request message when sending the answer. This implies that answers for higher priority transactions are given preferential treatment to lower priority transactions. The answer sender also has the option of including priority information in the answer message. This is done when the answer message needs to have a different priority than the priority carried in the request message. The priority included by the answer sender is application specific.