Definition - What does IP Network mean?
The Internet is the largest and best known IP network.
Techopedia explains IP Network
Each host is assigned a unique logical IP address, which distinguishes it from other nodes and helps initiate data communication with other hosts. IP network communication occurs when a host sends a data packet to another host by addressing its IP address. Similarly, the recipient identifies the sender by its IP address.
Moreover, an IP network requires that all connected devices - such as servers, switches, routers and other devices - be configured with the TCP/IP suite and have a valid IP address to perform any network communication.