SSCP · Question #1056
Which of the following is an extension to Network Address Translation that permits multiple devices providing services on a local area network (LAN) to be mapped to a single public IP address?
The correct answer is C. Port address translation. Port Address Translation (PAT) is the NAT extension that maps multiple internal devices to a single public IP address by differentiating connections using unique port numbers - this is why it's also called NAT overload, and it's how most home routers work. Why the distractors…
Question
Options
- AIP Spoofing
- BIP subnetting
- CPort address translation
- DIP Distribution
How the community answered
(35 responses)- B3% (1)
- C94% (33)
- D3% (1)
Explanation
Port Address Translation (PAT) is the NAT extension that maps multiple internal devices to a single public IP address by differentiating connections using unique port numbers - this is why it's also called NAT overload, and it's how most home routers work.
Why the distractors are wrong:
- A. IP Spoofing is a security attack where packets are sent with a forged source IP address - it has nothing to do with address mapping or LAN services.
- B. IP Subnetting divides a network into smaller logical segments to improve routing and management, but does not translate or share public IPs.
- D. IP Distribution is not a standard networking term and describes no real protocol or technology.
Memory tip: Think of PAT as a hotel receptionist (the single public IP) who routes calls to individual guests (internal devices) by their room number (port number) - one front desk, many rooms.
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