Which two disadvantages are of using proxy servers as compared to stateful firewalls? (Choose two)

Proxy servers actually conceal source addresses by substituting their own address when forwarding traffic, providing better anonymity than stateful firewalls.

Proxy servers operate at the application layer and must fully understand each protocol to terminate and re-initiate connections on behalf of clients; any new or unsupported application requires explicit proxy support to be added, unlike stateful firewalls which track connection state generically.

Because proxy servers terminate each client connection, inspect the full application payload, and establish a new connection to the server, they introduce significantly more processing overhead and latency compared to stateful firewalls that only track connection state tables.

NAT is not the primary security mechanism of proxy servers; their security comes from application-layer inspection and connection termination, not address translation.