what is a nat measurement

A NAT (Network Address Translation) is a method of mapping an IP address space into another by modifying network address information in the IP header of packets while they are in transit across a network. NAT is used to map multiple private addresses inside a local network to a public IP address before transferring the data to the internet. NAT helps conserve the number of globally valid IP addresses a company needs and has done a lot to extend the useful life of IPv4. There are three different types of NATs: basic NAT, source NAT, and stateful NAT. NAT is not a security service, but it can help qualify or authenticate incoming streams and match them to outgoing requests. The term "nat" also refers to a unit of information or information entropy based on natural logarithms and powers of e, rather than the powers of 2 and base 2 logarithms, which define the shannon).