100-150 Question 66
Single answerA small business is using a single public IP address from their ISP to allow multiple devices on their private network to access the internet. Which type of NAT is most likely being used in this scenario?
- A
Static NAT
- B
Dynamic NAT
- C
PAT (Port Address Translation)
- D
One-to-One NAT
Show answer and explanation
Correct answer: C
Explanation
In this scenario, the business is using a single public IP address for multiple devices to access the internet. PAT (Port Address Translation) is a type of NAT that allows this by mapping multiple private IP addresses to a single public IP address using different port numbers. This makes it the most appropriate choice for the situation described.
- A. Incorrect.
Static NAT maps one private IP address to one public IP address, which doesn't allow multiple devices to share a single public IP address. This is not suitable for the given scenario.
- B. Incorrect.
Dynamic NAT maps a pool of private IP addresses to a pool of public IP addresses, but it does not solve the issue of using a single public IP for multiple devices.
- C. Correct.
PAT (Port Address Translation) allows multiple devices to share a single public IP address by using unique port numbers for each connection. This fits the scenario where a small business uses a single public IP for internet access.
- D. Incorrect.
One-to-One NAT maps each private IP address to a unique public IP address, which requires as many public IP addresses as there are devices. This does not align with the scenario.