SAS 9.2 introduces
support for the next generation of Internet Protocol, IPv6, which
is the successor to the current Internet Protocol, IPv4. Rather than
replacing IPv4 with IPv6, SAS 9.2 supports both protocols. There is
a lengthy transition period during which the two protocols coexist.
A primary reason for
the new protocol is that the limited supply of 32-bit IPv4 address
spaces was being depleted. IPv6 uses a 128-bit address scheme. This
scheme provides more IP addresses than did IPv4.
IPv6 includes these
benefits over IPv4:
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larger address space (128 bits
rather than 32 bits)
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improved quality of service and
security
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compliance with regulatory requirements
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widespread use in global markets