Chapter 8: NAT

Question 1

Describe the differences between static NAT, dynamic NAT, easy IP, and NAPT. Provide configuration examples for each.

Answer 1

Static NAT: One-to-one mapping of private to public IP.
nat static global 203.0.113.2 inside local 192.168.1.2

Dynamic NAT: Uses a pool of public IPs for translation.
nat address-group 1 203.0.113.2 203.0.113.10
nat static inside local 192.168.1.0 24 global address-group 1

Easy IP: Uses the router’s public IP for NAT.
nat outbound 2000 address-group 1

NAPT (PAT): Multiple private IPs mapped to a single public IP with different ports.
nat outbound 2000 address-group 1 overload