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)
Source
来源：https://stackoverflow.com/questions/38002216/what-are-the-primary-differences-between-ipv4-and-ipv6