IPv6 Addressing
Need
- IPv4 uses 4 byte addresses:
- Total of one billion possible addresses
- IP addresses often assigned in (large) groups
- Giving out many numbers at a time
- ? IPv4 address space has been used up quickly
- e.g., Indiana University: uses a Class A IP address space (65,000 addresses; many more than needed)
IPv6 uses 16 byte addresses:
- 3.2 x 1038 addresses, a very large number
- Little chance this address space will ever be used up