2. (20 points) Network Address Translation (NAT) A. (5 points) Explain why NAT can be viewed as a means of extending the utilization of IPv4 addresses. B. (5 points) Name an additional benefit ofusing NAT, besides extending the utilization of IPv4 addresses. C. (10 points) Below is the translation table in a NAT router. The NAT router has public IP Address 64.233.169.104 For the incoming response packet (Gublic network side) to the request from private node 172.18.3.2 in row 2 of the table Write the source IP Address, and Port; destination IP Address and Port destination source ExternalExternal Transport port 80 80 Private protocol TCP address 172.18.3.125.8.3.280 172.18.3.2 port 1400 1401