Static NAT can only implement one-to-one mapping between private and public addresses.

The statement is false because of the word "only". While static NAT is fundamentally a one-to-one mapping, this can be applied to more than just IP addresses. Specifically, it can be used for port mapping. In this scenario, a single public IP address can be mapped to multiple different private IP addresses, provided that a different port is used for each mapping. For example, PublicIP:80 can map to PrivateIP1:80, and the same PublicIP:8080 can map to PrivateIP2:80. This is a one-to-many mapping of the public address, even though each specific service (IP+port) is mapped one-to-one. Therefore, static NAT is not limited only to a one-to-one mapping between addresses.

This is a True/False question. The statement is not true because static NAT supports port-level mapping, which allows a single public address to serve multiple internal hosts, breaking the strict "one-to-one address mapping only" constraint.

1. Huawei HCIA-Datacom V1.0 Training Material, "NAT Principles", Section: Static NAT. "Static NAT implements one-to-one mapping between private and public IP addresses... If only a specific port of the internal server needs to be accessible to external networks, you can configure a static NAT mapping between 'private IP address + port number' and 'public IP address + port number'." This description confirms that mappings can be more granular than just IP addresses, allowing a single public IP to be reused.