Which of these represents an IPv6 link-local address?
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A. B. C. D.A
In the Internet Protocol Version 6 (IPv6), the address block fe80::/10 has been reserved for link- local unicast addressing. The actual link local addresses are assigned with the prefix fe80::/64. They may be assigned by automatic (stateless) or stateful (e.g. manual) mechanisms.
The correct answer is A. FE80::380e:611a:e14f:3d69
Explanation: IPv6 link-local addresses are used for communication within a single subnet and do not require a global unique address. The prefix for IPv6 link-local addresses is FE80::/10.
Let's break down the answer options:
A. FE80::380e:611a:e14f:3d69 - This is a valid IPv6 link-local address because it starts with the FE80 prefix and has a valid interface identifier.
B. FE81::280f:512b:e14f:3d69 - This is not a valid IPv6 link-local address because it starts with the FE81 prefix, which is not part of the link-local address range.
C. FEFE:0345:5f1b::e14d:3d69 - This is not a valid IPv6 link-local address because it starts with the FEFE prefix, which is reserved for site-local addresses that are no longer recommended for use.
D. FE08::280e:611:a:f14f:3d69 - This is not a valid IPv6 link-local address because it starts with FE08, which is not part of the link-local address range.
Therefore, the correct answer is A. FE80::380e:611a:e14f:3d69.