Network Address Translation
Network Address Translation (NAT) is a networking technique that modifies IP address information in packet headers while in transit across a traffic routing device, typically a router or firewall. It allows multiple devices on a private network to share a single public IP address for internet access, conserving IPv4 addresses and enhancing security by hiding internal network structures.
Developers should understand NAT when building networked applications, configuring cloud infrastructure, or troubleshooting connectivity issues, as it affects how traffic flows between private and public networks. It's essential for scenarios like deploying applications behind firewalls, setting up VPNs, or working with IPv4 address exhaustion in enterprise or home networks.