Different between Public and Private IP Address

what is IP Address ?

An IP address is a numeric address. it is an identifier for a computer or device on a network. IP address for communication purposes.

There are two types of IP address :-

1. IPv4
2. IPv6

IPv4

• Developed by DARPA (Defence Advanced Research Projects Agency) in 1981.
• Managed and distributed by IANA ( Internet Assigned Number Authority ).
• Represented into dotted decimal number.
• It supports unicasting, multicasting and broadcasting transmission way.

IPv6

• Developed by IETF in 1998.
• It has 128 bits divided into 8 groups each having 16 bits.
• Represented into Hexadecimal Number System.
• These addresses supports unicasting, multicasting and any-casting.

Different between Public and Private IP Address:-

Private IP Address

• The scope of Private IP is LAN or Local.
• A private IP is Non unique. Can be used on other private networks.
• Not recognized over Internet.
• Private IP addresses are secure.
• Private IP address are only used internally (home, business etc).
• DCHP is a service used in routers to assign private IPs.
• Not Publicly registered.
• Assigned by a router.
• it is free
• it is require Network Address Translation (NAT).

If you want to know more about private IP address, please check on https://en.wikipedia.org/wiki/Private_network

Ranges

Public IP Address

• The scope of Public IP is global.
• A public IP is unique globally.
• Recognized over Internet.
• Public IP addresses are not secure
• used externally
• Assigned by an ISP.
• it is a not free
• it is not require Network Address Translation (NAT).

Ranges

• 1.0.0.0 – 9.255.255.255
• 11.0.0.0 – 126.255.255.255
• 129.0.0.0 – 169.253.255.255
• 169.255.0.0 – 172.15.255.255
• 172.32.0.0 – 191.0.1.255
• 192.0.3.0 – 192.88.98.255
• 192.88.100.0 – 192.167.255.255
• 192.169.0.0 – 198.17.255.255
• 198.20.0.0 – 223.255.255.255

If you want to know more about Public IP address, please check on https://en.wikipedia.org/wiki/IP_address#Public_addresses