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What is NAT and why does it matter for security?
What is NAT and why does it matter for security? NAT (Network Address Translation) lets many private devices share one public IP address. All the phones in a home use one public IP on the internet because the router does NAT. “NAT hides the internal layout from casual view, but it is not a firewall.
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What this card says
Short answer
NAT (Network Address Translation) lets many private devices share one public IP address.
Example
All the phones in a home use one public IP on the internet because the router does NAT.
Say it in the interview
“NAT hides the internal layout from casual view, but it is not a firewall. I still need security groups and host firewalls.”
Why it matters
People wrongly think NAT alone protects them. It does not filter attacks; it only shares an address.
Learn more in the lesson: 46.2 Networking Interview Questions