CompTIA: Advanced Security Practitioner (CASP) Exam Prep

Answer: C - NAT is the term that best describes using one externally facing address to communicate between an internal network and external networks.

Key Takeaway: NAT, or Network Address Translation, is a description of the network setup in which the private internal addresses get translated and appear to all be coming from the same externally facing public IP address. The device that is performing NAT keeps track of which packets go where by means of assigning the internal addresses ports and using these ports to ensure communications are routed properly.