An IP address (or Internet Protocol address) identifies each networked computer and device on a network. When computers communicate with each other on the Internet or a local network, they send information to each otherís IP addresses.
Your computer likely has public and private IP addresses. Youíll need the IP address if youíre hosting server software Ė the client computers will need your computerís IP address to connect to it.
Public vs. Private IP Addresses

IP addresses can be either public or private. ďPublicĒ means an IP address can be reached from the Internet, while ďprivateĒ means it canít. For example, in a typical home network, a router has a public IP address on the Internet. The computers, smartphones, game consoles, and other devices behind the router all have unique private IP addresses on the home network. The router acts as an intermediary, forwarding traffic to the local IP addresses that request it. From an outside perspective, all devices on the home network are communicating with the Internet from a single public IP address.
Assuming youíre behind a router performing network address translation, you have two IP addresses that matter. Your computerís IP address is likely a private IP address, probably starting with 192.168 ó is a range of IP addresses specially allocated to private networks. You also likely have a public IP address, which is used when communicating with other computers over the Internet.


For example, if youíre hosting a server on your computer, people on the Internet will need the public IP address from your router to connect to your server. People behind your router ó on the same local network as your computer ó will need the local IP address from your computer to connect.
If your computer is connected directly to the Internet with no router sitting in between, your computerís IP address is a public IP address.

Finding Your Private IP Address

To find your computerís IP Address on Windows, open the Control Panel and select View network status and tasks.


Click the name of your Internet connection to view its status.


Click the Details button in the connectionís status window.


Youíll find the IP address listed in the Network Connection Details window Ė look for the IPv4 Address field


A quick way to find your IP address in Windows is by running the ipconfig command in a Command Prompt window.
Youíll see your IP address in the IPv4 Address row beneath the name of your connection.


If youíre using Ubuntu or another Linux distribution,
check out our guide to finding your IP address on Ubuntu.

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source : how to geek