Differences between IPv4 and IPv6

The following table summarizes the major differences between IPv4 and IPv6:


Feature IPv4 IPv6
Address length 32 bits 128 bits
Address representation 4 decimal numbers from 0-255 separated by periods 8 groups of  4 hexadecimal digits separated by colons
Address types unicast, multicast, broadcast unicast, multicast, anycast
Packet header 20 bytes long 40 bytes long, but simpler than IPv4 header
Configuration manual, DHCP manual, DHCP, auto-configuration
IPSec support optional built-in