Which of the following descriptions is true about a static NAT?

Many-to-many mapping describes dynamic NAT using an address pool, where multiple private IPs map to multiple public IPs from a pool, not static NAT.

One-to-many mapping describes PAT (Port Address Translation), also called NAT overload, where many private IPs share a single public IP differentiated by port numbers.

Many-to-one mapping also describes PAT/NAT overload, not static NAT, as it allows multiple internal hosts to share one public IP address.

Static NAT permanently maps exactly one inside local (private) IP address to one inside global (public) IP address. This fixed mapping is manually configured and persists regardless of traffic, making it suitable for servers that must be consistently reachable from the internet using a predictable public address. This distinguishes it from dynamic NAT and PAT, which use pooled or shared addresses.