to care for the number of available routable public addresses, ISPs are looking to assign the lowest number of IPS for each client, and most do it dynamically using dhcp so that when a customer decides to terminate the contract, the available IP be used immediately. The process of NAT is that the packages reach the router through its public interface and then the router will responsible for delivering the various packages hosts.
To understand the concept of PAT is necessary to clarify that from the perspective of the server no difference between multiple hosts implemented a number of TCP connections or hosts one implementing the same number of TCP connections.
Then PAT is responsible for translating the private addresses of the hosts on the public address of the router.
In step 1, pc1 sends a packet to the server 128.127.1.1 because that is your default gateway.
In step 2, R1 takes place based on the chart PAT NAT, use the router's public IP address instead of the host address to send the default route.
IN 3, the server responds to the ip 64.100.1.1 since these values \u200b\u200bare given in step 2 and it is a routeable ip.
In 4, R1 change the address and port through the NAT table to 192.168.1.101/1024 64.100.1.1/1024 changing.
0 comments:
Post a Comment