Author Topic: Network address translation [NAT]  (Read 715 times)

prakash.datasoft

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Network address translation [NAT]
« on: December 16, 2014, 05:19:36 AM »
In computer networking, network address translation (NAT) provides a method of modifying network address information in Internet Protocol (IP) datagram packet headers while they are in transit across a traffic routing device for the purpose of remapping one IP address space into another. The term NAT44 is sometimes used to more specifically indicate mapping between two IPv4 addresses; this is the typical case while IPv4 carries the majority of traffic on the Internet. NAT64 refers to the mapping of an IPv4 address to an IPv6 address, or vice versa.

Network administrators originally used network address translation to map every address of one address space to a corresponding address in another space, such as when an organization changed Internet service providers without having a facility to announce a public route to the network.[citation needed] As of 2014 NAT operates most commonly in conjunction with IP masquerading, which is a technique that hides an entire IP address space - usually consisting of private network IP addresses (RFC 1918) - behind a single IP address in another, usually public address space. Vendors implement this mechanism in a routing device that uses stateful translation tables to map the "hidden" addresses into a single IP address and that readdresses the outgoing Internet Protocol packets on exit so they appear to originate from the routing device. In the reverse communications path, the router maps responses back to the originating IP addresses using the rules ("state") stored in the translation tables. The translation table rules established in this fashion are flushed after a short period unless new traffic refreshes their state.

Pavithra M

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Re: Network address translation [NAT]
« Reply #1 on: January 11, 2015, 02:36:16 AM »
Network Address Translation (NAT) is the process where a network device, usually a firewall, assigns a public address to a computer (or group of computers) inside a private network. The main use of NAT is to limit the number of public IP addresses an organization or company must use, for both economy and security purposes.

hruthika

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Re: Network address translation [NAT]
« Reply #2 on: January 19, 2015, 09:22:58 PM »
Hi,

Short for Network Address Translation, an Internet standard that enables a local-area network (LAN) to use one set of IP addresses for internal traffic and a second set of addresses for external traffic. A NAT boxlocated where the LAN meets the Internet makes all necessary IP address translations.

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priyanka

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Re: Network address translation [NAT]
« Reply #3 on: January 31, 2015, 02:49:27 AM »
hi,


Network Address Translation (NAT) is the process where a network device, usually a firewall, assigns a public address to a computer (or group of computers) inside a private network. The main use of NAT is to limit the number of public IP addresses an organization or company must use, for both economy and security purposes.


Thanks
priyanka