6.3.d Implement and troubleshoot IPv4 network address translation

6.3.d [i] Static NAT, dynamic NAT, policy-based NAT, PAT

You can implement address translation as dynamic NAT, Port Address Translation (PAT), static NAT, static PAT, or as a mix of these types. You can also configure rules to bypass NAT; for example, to enable NAT control when you do not want to perform NAT (e.g. IPSec VPN IP subnets). The following translation types are available:

● Dynamic NAT—Dynamic NAT translates a group of real addresses to a pool of mapped addresses that are routable on the destination network.

● PAT—PAT translates multiple real address to a single mapped IP address.

● Static NAT—Static NAT creates a fixed translation of real addresses to mapped addresses. With dynamic NAT and PAT, each host uses a different address or port for each subsequent translation.

● Static PAT—Static PAT is the same as static NAT, except that it enables you to specify the protocol and port for the real and mapped addresses

Adam, Paul (2014-07-12). All-in-One CCIE V5 Written Exam Guide (Kindle Locations 5988-6001).  . Kindle Edition.