Suggested Answer:C🗳️
Section: Addressing and Routing Protocols in an Existing Network Explanation
An IP version 6 (IPv6) enabled computer will use the prefix FE80::/10 to automatically configure an IPv6 address for itself. The IPv6 prefix FE80::/10 is used for unicast link-local addresses. IPv6 addresses in the FE80::/10 range begin with the characters FE80 through FEBF. Unicast packets are used for one-to-one communication. Link-local addresses are unique only on the local segment. Therefore, link-local addresses are not routable. Unicast link-local addresses are used for neighbor discovery and for environments in which no router is present to provide a routable IPv6 prefix. IPv6 was developed to address the lack of available address space with IPv4. An IPv6 address is a 128bit (16byte) address that is typically written as eight groups of four hexadecimal characters, including numbers from 0 through 9 and letters from A through F. Each group of four characters is separated by colons. Leading zeroes in each group can be dropped. A double colon can be used at the beginning, middle, or end of an IPv6 address in place of one or more contiguous four character groups consisting of all zeroes. However, only one double colon can be used in an IPv6 address. Therefore, the following IPv6 addresses are equivalent: ✑ FE80:0000:0000:070D:0000:50A0:0001:0024 ✑ FE80::070D:0000:50A0:0001:0024 ✑ FE80:0:0:70D:0:50A0:1:24 ✑ FE80::70D:0:50A0:1:24 An IPv6enabled computer will not use the prefix 2000::/3 to automatically configure an IPv6 address for itself. The IPv6 prefix 2000::/3 is used for global aggregatable unicast addresses. IPv6 addresses in the 2000::/3 range begin with the characters 2000 through 3FFF. Global aggregatable unicast address prefixes are distributed by the Internet Assigned Numbers Authority (IANA) and are globally routable over the Internet. Because there is an inherent hierarchy in the aggregatable global address scheme, these addresses lend themselves to simple consolidation, which greatly reduces the complexity of Internet routing tables. An IPv6enabled computer will not use the prefix FC00::/7 to automatically configure an IPv6 address for itself. The IPv6 prefix FC00::/7 is used for unicast unique- local addresses. IPv6 addresses in this range begin with the characters FC00 through FDFF. Unique-local addresses are not globally routable, but they are routable within an organization. An IPv6enabled computer will not use the prefix FF00::/8 to automatically configure an IPv6 address for itself. The IPv6 prefix FF00::/8 is used for multicast addresses, which are used for one-to-many communication. IPv6 addresses in the FF00::/8 range begin with the characters FF00 through FFFF. However, certain address ranges are used to indicate the scope of the multicast address. The following IPv6 multicast scopes are defined: ✑ FF01::/16 -nodelocal ✑ FF02::/16 -linklocal ✑ FF05::/16 -uniquelocal ✑ FF08::/16 -organizationlocal ✑ FF0E::/16 -global Reference: Cisco: IPv6: A Primer for Physical Security Professionals
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