Every machine on the the Internet has a unique number assigned to it, called an IP address. Without a unique IP address on your machine, you will not be able to communicate with other devices, users, ...

If a computer is unable to configure a valid Internet Protocol address, it can't connect to a network. If you plug a laptop directly into a modem with an Ethernet cable and receive a "No Valid IP ...

(Internet Protocol address) The address of a connected device in a TCP/IP network, which is the worldwide standard both in-house and on the Internet. Every desktop and laptop computer, server, scanner ...