Differences between IPv4 and IPv6

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

 

FeatureIPv4IPv6
Address length32 bits128 bits
Address representation4 decimal numbers from 0-255 separated by periods8 groups of  4 hexadecimal digits separated by colons
Address typesunicast, multicast, broadcastunicast, multicast, anycast
Packet header20 bytes long40 bytes long, but simpler than IPv4 header
Configurationmanual, DHCPmanual, DHCP, auto-configuration
IPSec supportoptionalbuilt-in