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

The difference between ip version 4 and ip version 6? IPv4 is like a tiny apartment, IPv6 is a mansion.

But honestly, the coolest part is no more ARP. IPv6 uses NDP (Neighbor Discovery Protocol). Less broadcast noise, faster networks.

Downside? Compatibility. Some old gear just won’t play nice. If you’re testing, Wireshark has great IPv6 filters to debug stuff.