Which of the statements concerning proxy firewalls is correct?

Proxy firewalls introduce processing overhead for each connection because they must terminate and re-initiate connections, which reduces rather than increases network speed.

Proxy firewalls centralize application activity through a single intermediary point of control, they do not decentralize it.

Blocking network packets from passing directly describes a packet-filtering firewall, whereas proxy firewalls forward traffic by proxying it through new connections rather than simply dropping packets.

A proxy firewall terminates the inbound client connection and establishes a brand-new outbound connection to the target server, so the two endpoints never communicate directly. This two-connection model allows the proxy to fully inspect and filter application-layer content before forwarding it. This behavior is the defining characteristic that distinguishes proxy firewalls from packet-filtering and stateful inspection firewalls.