How does a SOCKS-based firewall provide protection?

A.
By providing one proxy per protocol

B.
By acting as a proxy

C.
By denying any access attempts from internal entities

D.
By inspecting protocol commands

Explanation:
Products that are based on the SOCKS firewall technology are
circuit-level firewalls. This means that they only look at packet header information
(address, port numbers) to make access decisions. They do not look into the packet’s
payload to review protocol commands or provide a proxy per service. Those are
characteristics of an application-level proxy product.