What are two benefits of using NAT?（）

• A、NAT protects network security because privat enetworks are not advertised.
• B、NAT accelerates the routing process because no modifications are made on the packets.
• C、Dynamic NAT facilitates connections from the outside of the network.
• D、NAT facilitates end-to-end communication when IPsec is enable.
• E、NAT eliminates the need to re-address all host that require extemal access.
• F、NAT conserves addresses through host MAC-level multiplexing.