Consider a host A behind NAT, sending a packet to another external host B. The packets (sent by A and response packet from B) are shown below: Packet sent by A (before modified by NAT): dst IP: 4.3.2.1 src IP: 192.168.2.7 dst port: 80 src port: 1067 Response packet sent by B (before modifed by NAT): dst IP: 2.2.2.2 src IP: 4.3.2.1 dst port: 2500 src port: 80 i (4 pts) For the response packet leaving NAT towards A, fill the blank: dst IP: src IP: dst port: src port: ii (3 pts) Fill the following: external IP address of the NAT: IP address of host A: IP address of host B