Ipv4 and ipv6 difference of

1.  
   Different address spaces, the predetermined IP address of the IPv4 is 32, while the IPv6 IP address length is 128.
    
2.  
   Routing tables of different sizes, IPv6 routing table is smaller compared to IPv4.
    
3.  
   Support for IPv6 multicast support and convection is stronger than IPv4.
    
4.  
   Different security, IPv6 higher safety, when using the IPv6 network, the user can encrypt data network layer.
    
5.  
   Expansion of different protocols, IPv6 and IPv4 protocol is allowed to be expanded is not allowed.