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

 


Download our Free CCNA Study Guide PDF for complete notes on all the CCNA 200-301 exam topics in one book.

We recommend the Cisco CCNA Gold Bootcamp as your main CCNA training course. It’s the highest rated Cisco course online with an average rating of 4.8 from over 30,000 public reviews and is the gold standard in CCNA training: