Friday, 16 September 2016

Internal IP vs External IP

Internal IPExternal IP
It is also referred as "Private IP" or "Local IP".It is also refereed as "Public IP"
It is the address that is assigned by our local network router and it has own specific ranges.It is the address that is assigned by the Internet Service Provider(ISP).
Internal IP is a type of LAN(Local Area Networks).External IP is a type of WAN(Wide Area Networks).
This IP is only seen by other computers which are connected in our local network.This IP is seen by all computers which are are connected to the internet.
We can't use Internal IP on the internet because this IP address ranges are blocked by internet routers.We can use External IP address to connect with the internet.
Internal IP is identified by computer with in local networks.External IP is identified by computer on whole internet networks.
Internal IP is unique within network organization.External IP is globally unique.


Internal IP ranges:
IANA(Internet Assigned Numbers Authority) is reserved following IPv4 address ranges for Private Networks :
  • 10.0.0.0 - 10.255.255.255  (Class A network)
  • 172.16.0.0 - 172.31.255.255  (Class B network)
  • 192.168.0.0 - 192.168.255.255  (Class C network)

Finding Internal IP:
  • Open Command Prompt
  • Then type "ipconfig"  then press enter. 



Finding External IP:
  • In google type "IP" or "my IP". It shows your External IP address.

Examples for Internal IP vs External IP: