Answer:
Neither always do application content filtering nor have the slow speed of relay operation.
Explanation:Stateful packet inspection is a dynamic firewall filtering which filters the inflow and outflow of packets of Information from time to time. It is also known to act as monitor for the state of a connection in a Network system. The filtering decisions of a stateful inspection firewall is based on two facts
(1) The rules defined by the administrator
(2) The previous context developed based on the filtering that taken place before.