CCNA- NAT- (Network Address Translation)-Part-1



What is NAT?

NAT is used to allowing many private ip address to be act as public smaller amount public ip address.

Advantage of NAT: conserve legally registered address(Public) & Reduce address overlap.

Types of NAT: 1) Static:– One to One mapping between public & private address

2)Dynamic– One to many. Dynamic NAT uses a pool of public addresses and assigns them on a first-come, first-served basis.Dynamic NAT is useful
when fewer addresses are available.

3) PAT: Many to one. Multiple unregistered ip address map to a single Public address using ports.

Local Address  :  The private address before NAT translation.

Global Address:  Usually the public addresses. Address used after the NAT translation.



About Author

Chakraborty Prijus

Former Asst. Manager (IT) - MGH Group MCA (Masters in Computer Application) From Sikkim Manipal University India. Have 5 years experience In IT field.

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