NAT
Network Address Translation — maps private addresses to public ones at a network boundary.
NAT maps private (RFC 1918) addresses to public ones at the boundary, conserving public IPv4 and incidentally hiding internal addressing. It is not a security control on its own — inbound connections are merely unmapped, not filtered — so it must be paired with a firewall. PAT (port address translation) multiplexes many internal hosts onto one public IP and is what home routers do by default.
PlayPrepHQ study notes are written and reviewed against primary exam sources. How we create & review content →