What’s the main difference between IP version 4 and IP version 6? or Can someone explain the key diff

IPv6’s header is simpler but also smarter. No more fragmentation at routers—endpoints handle it. And ICMPv6 is actually useful now (not just for pings).

But the real difference between ip version 4 and ip version 6? Adoption. ISPs are lazy.

Try Hurricane Electric’s [IPv6 Certification](https://ipv6.he.net/certification/) if you wanna dive deeper. It’s free and super helpful.