Refer to the exhibit. R1 is performing NAT for the 10.1.1.0/24 network, and R2 is performing NAT for the 192.168.1.2/24 network. What would be valid destination IP address for HostA to put in its IP header when communicating with the web server?

When HostA communicates with the web server, it must use the web server's actual public IP address (172.30.20.2) as the destination. R1 performs NAT on the 10.1.1.0/24 network, translating HostA's private source address to a public address. R2 performs NAT for the 192.168.1.0/24 network on the server side. The destination IP in HostA's IP header remains the web server's public address throughout; only the source address gets translated by NAT.