What is the primary purpose of Network Address Translation (NA

Network Address Translation (NAT) allows multiple devices on a private network (each with a private IP address) to share a single public IP address when communicating with the internet, by translating private addresses to the public address (and back) at the router. This conserves the limited pool of public IPv4 addresses and adds a layer of obscurity to internal network structure. It does not perform encryption, MAC address assignment, domain name resolution, or intrusion detection — those are the roles of VPNs/TLS, DHCP/ARP, DNS, and IDS/IPS respectively.