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

The statement is false. While the most basic form of static NAT creates a one-to-one mapping between a private IP address and a public IP address, it is not limited to this function only. Static NAT can also be configured to perform port-specific translations. This allows multiple services running on different internal private IP addresses to be mapped to a single public IP address using different public port numbers. For example, a web server on 192.168.1.10:80 and a mail server on 192.168.1.11:25 can both be mapped to the public IP 203.0.113.5 on ports 80 and 25 respectively. This is a many-to-one mapping at the IP address level, disproving the claim that static NAT can only perform one-to-one mapping.

This is a True/False question. The statement is incorrect because the word "only" creates an absolute condition that is not met by the full capabilities of static NAT as implemented on modern network devices like Huawei's.

1. Huawei Enterprise Networking Documentation. (2021). NE40E V800R021C00 Product Documentation - NAT Configuration Guide. Section: "Configuring Static NAT". The documentation provides examples for the nat static command that include port mapping, such as nat static protocol tcp global 202.10.1.3 80 inside 192.168.1.2 8080. This command explicitly maps a specific internal IP and port to a specific external IP and port, demonstrating a capability beyond simple one-to-one address mapping.

2. Kurose, J. F., & Ross, K. W. (2017). Computer Networking: A Top-Down Approach (7th ed.). Pearson. Chapter 4, Section 4.4.2 "Network Address Translation (NAT)". The text describes how a NAT router can be configured with static mappings to allow external clients to initiate connections to internal servers, often involving specific port numbers, a concept also known as port forwarding.