What is a private IP address and there process of work
Private IP addresses are address used within an organization, the name itself suggests that it is used for private purposes; Internet Assigned Numbers Authority (IANA) has reserved certain IP address as private address. Private IP address are used either to hide systems from the public Internet or to provide an additional range of address to organizations that do not have sufficient public IP address to distribute on their network. It is very important that private address used within an organization do not conflict with each other. And organizations can use these numbers to assign internal Ip address without having to worry about an IP address conflict or having to obtain a new block of IP address. Using a private IP address will make your computer invisible to certain types of network attacks.
These blocks of private Ip address can be used by anyone, anywhere even if your neighbor is using the exact same address this won’t cause a problem. This is because these private addresses are known as non-routable address and the devices on the internet that move data from one place to another are specially programmed to recognize these address. These devices known as router will recognize that these are private address belonging to your network and will never forward your traffic onto the internet so for your connection to work; you will always require at least one real address from the general pool so that your home router can perform what is known as NAT (Network Address Translation).
NAT is a process where your router converts private IP address into a public address, because without NAT you will not be able to connect to internet, the reason is internet will not route private ip address, its only known to route packet on public Ip address, So this is taken care of NAT which is by default installed into your modem or router.
Use of Private IP address
For computers that do not need Internet connectivity, such as printers, print servers, and local file servers, private addresses allow them to communicate with computers on the local network or remote computers connected to VPN, but not be vulnerable to attacks from the Internet.
For servers such as backup or database servers that need to communicate only with locally connected servers, which then communicate with the outside world, private addresses allow server-to-server communication over a dedicated, private network.
The private networks are not accessible even to other computers on the local network. This kind of network is sometimes referred to as a back-net because it is used for communication between front-end and back-end servers.
For users who have not registered their computers with the DHCP service, the network assigns internal addresses so they have enough connectivity to reach the DHCP registration web page.
Private IP address ranges
Class A = 10.0.0.0 – 10.255.255.255
No of address: 16,777,216
Network address: 10.0.0.1
Broadcast address: 10.255.255.254
Class B = 172.16.0.0 – 172.31.255.255
No of address: 1,048,576
Network address: 172.16.0.1
Broadcast address: 172.31.255.254
Class C = 192.168.0.0 192.168.255.255
No of address: 65,536
Network address: 192.168.0.1
Broadcast address: 192.168.255.254
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