Network Address Translation (NAT) is a process of converting a local IP address into global IP addresses and vise-Versa. The address types used in NAT (Network Address Translation) is of four types as classified.
These four types of NAT (network address translation) are of listed below:
- Inside Local Address
- Inside Global Address
- Outside Local Address
- Outside Global Address
Before moving on to the types of network address translation first you need to understand what local address and global address. Local address is the type of address which resides on the inside portion of the network and Global address as the type of address that resides on the outside portion of the network.
Outside Local Address Inside Local Address
The term Inside refers to inside a network. Inside local address is the IP address which is assigned to a host on the inside network or we can say private network. This address is not an authorized address that is assigned by the service provider or Network Information Center (NIC). Or in a simpler way, we can say that the inside local address is nothing but the IP address assigned to a workstation inside the private network. Inside Local Address is nothing but the private IP address, which stays inside any particular private network.
Inside Global Address
Inside global address is nothing but the public IP address which is assigned to a router which is facing the outside network or public network to be used as the IP address for communicating with the public network or we can say global network. This address is an authorized address that is assigned by the service provider or Network Information Center (NIC) which represent one or more private IP address to the outside world.
Outside local address is the IP address which is the IP address of the device which is in public network. In other words, we can say that outside local address are nothing but the private IP address assigned to the devices which are connected to that network in other private networks. It may be legitimate or not.
Outside Global Address
Outside global address is the IP address which is public and assigned to the end devices of the other network to establish a connection between other devices on the internet. This address is assigned from the globally routable address or we can say that outside global addresses are public IP addresses which are routable.
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