NAT Address Pool

A.

The correct answer is A. NAT pool.

Explanation:

NAT (Network Address Translation) is a technique used in networking to translate private IP addresses used in local networks to public IP addresses used on the internet. NAT allows devices on a private network to share a single public IP address, which helps to conserve IP addresses and provide security.

A NAT pool is a group of public IP addresses that are available for NAT use. When a device on the local network needs to communicate with a device on the internet, the NAT device selects an available IP address from the NAT pool and translates the private IP address of the local device to the selected public IP address.

Dynamic NAT is a type of NAT in which a device on the local network is assigned a different public IP address from the NAT pool each time it connects to the internet. This provides some level of security by making it more difficult for attackers to track a specific device on the internet.

Static NAT is a type of NAT in which a specific private IP address is always mapped to a specific public IP address. This is often used for servers or devices that need to be accessed from the internet.

One-way NAT is a type of NAT in which only one direction of communication is translated. For example, incoming traffic from the internet may be translated to a specific device on the local network, but outgoing traffic from that device is not translated. This can be used to provide some level of security by limiting the exposure of devices on the local network to the internet.

In summary, a NAT pool is a group of public IP addresses available for NAT use, and dynamic NAT, static NAT, and one-way NAT are different types of NAT configurations that use NAT pools to provide connectivity and security in a network.