Bing found the following results
Open "Internet Protocol Version 4 (TCP/IPv4) Properties" using ...
Internet Protocol version 4 - Wikipedia
What Is IPv4 (Internet Protocol Version 4)? - Coursera
Internet Protocol - Wikipedia
IPv4 - NETWORK ENCYCLOPEDIA
9 IP version 4 - An Introduction to Computer Networks
Internet Protocol Version 4 - Techopedia
Introduction to IP (Internet Protocol) Version 4
What is the Internet Protocol? | Cloudflare
IPv4 - ICANNWiki