What type of NAT uses statically assigned IP addresses?

• A. Dynamic NAT
• B. Static NAT
• C. Public NAT
• D. Automatic NAT

Answer: (B)

Static NAT is the correct answer because it involves the mapping of a private IP address to a public IP address in a one-to-one relationship. In Static NAT, each private IP is statically assigned a specific public IP, which means that the translation remains constant. This method is useful for devices that need to be consistently accessible from outside the network, such as web servers or mail servers, allowing them to maintain the same public address at all times.

The other types of NAT do not utilize statically assigned IP addresses in the same manner. Dynamic NAT, for example, assigns a public IP address from a pool to a private IP address on a temporary basis, meaning the public address can change over time. Automatic NAT typically refers to mechanisms that streamline the NAT configuration process but do not imply static assignments. Public NAT is not a standard term used in networking and may lead to confusion as it does not specifically define a type of NAT based on the static assignment of IPs.