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Cisco CCENT/CCNA ICND1 100-101 Official Cert Guide by Wendell Odom

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Chapter 26. IPv6 Addressing and Subnetting

IPv4 organizes the address space in a couple of ways. First, IPv4 splits addresses by class, with Classes A, B, and C defining unicast IPv4 addresses. (The term unicast refers to the fact that each address is used by only one interface.) Then, within the Class A, B, and C address range, the Internet Assigned Numbers Authority (IANA) and the Internet Corporation for Assigned Names and Numbers (ICANN) reserve most of the addresses as public IPv4 addresses, with a few reserved as private IPv4 addresses.

IPv6 does not use any concept like the classful network concept used by IPv4. However, IANA does still reserve some IPv6 address ranges for specific purposes, even with some address ranges that serve as ...

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