What are the primary differences between IPv4 and

问题:

I understand that the pool of IP addresses has been increased (32bit to 128bit).

Are there some other primary differences between the two?

回答1:

IPv4 uses a 32-bit address scheme, allowing for 2^32 different addresses. IPv6 uses a 128-bit address scheme, allowing for 2^128 different addresses.

The biggest improvement of IPv6 was the huge increase of possible addresses. There are some other important technological changes though:

• No more NAT (Network Address Translation)
• Auto-configuration
• No more private address collisions
• Better multicast routing
• Simpler header format
• Simplified, more efficient routing
• True quality of service (QoS), also called "flow labeling"
• Built-in authentication and privacy support
• Flexible options and extensions
• Easier administration (say good-bye to DHCP)

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