NAT and NAPT What The Difference

NAT and NAPT
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What is the difference between NAT and NAPT?

 – NAT and NAPT Network address translation, or NAT for short, is a process that modifies the IP address contained in the header of a packet while passing through a routing device. NAT allows a set of IP addresses to be used for traffic on a local area network or LAN, and another set of these IP addresses to be used for external traffic. .
One-to-one conversion of IP addresses is provided by the simplest form of NAT. Network port and address translation, or NAPT for short, is an extension of NAT that allows multiple IP addresses to be assigned to a single IP address. This is done with the help of TCP and UDP port information in the outbound traffic.

What is NAT?

Network Address Translation is a process that modifies the IP address contained in the header of a packet while passing through a routing device. NAT allows a set of IP addresses to be used in traffic within a LAN and another set of IP addresses to be used for external traffic. One-to-one conversion of IP addresses is provided by the simplest form of NAT. NAT has several advantages.

By providing the option to hide internal IP addresses in NAT, the security of a local area network is enhanced. In addition, since these IP addresses are used only internally, there will be no interference with the IP addresses used in other organizations. It will also be possible for NAT to use a single Internet connection for all computers on a local network. NAT works with a NAT box located in the interface that connects the local network to the Internet. This includes a set of valid IP addresses, and NAT will be responsible for translating these IP addresses.

What is NAPT?

Network Address and Port Translation, or NAPT for short, is used to address a set of private IP addresses using a single IP address or a small group of public IP addresses. NAPT is also referred to as PAT (port Address Translation), IP coverage, and multi-NAT. In NAPT, multiple IP addresses are assigned to a single IP address.

This creates ambiguity when routing return packets. To prevent this problem, NAPT uses the TCP / UDP port information in the output traffic and maintains a translation table. Such a feature allows return packages to be delivered correctly to the requester.

What is the difference between NAT and NAPT?

NAT modifies the IP address in the header of a packet as it passes through a routing device and allows a different set of IP addresses for traffic within a Local area network and another set of IP addresses are used for external traffic, while NAPT is a special type of NAT in which multiple private IP addresses to a single IP or a small group of IP addresses Public foundation is allocated. Therefore, NAPT is responsible for translating multiple IP addresses into one address. NAPT is the most common form of NAT, which is why NAPT is often referred to as NAT.

See Also Client server and Peer to Peer See the difference

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