Can someone explain what is IP version 4 in simple terms? or What is IP version 4 and why is it still

Short answer: IPv4 = internet’s OG addressing system. Long answer: It’s a 32-bit scheme split into 4 octets (e.g., 10.0.0.1).

Why’s it still around? Legacy systems, cost to upgrade, and NAT (Network Address Translation) stretches its lifespan.

Try subnetting practice on subnetting.org—it’ll help you grok what is ip version 4 better.