Which three statements about IPv6 address fd14:920b:f83d:4079::/64 are true? (Choose two)
A. The subnet ID is 14920bf83d
B. The subnet ID is 4079
C. The global ID is 14920bf83d
D. The address is a link-local address
E. The global ID is 4079
F. The address is a unique local address
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BC.
Site Prefix SubnetID Int. ID
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fd14:920b:f83d:4079::/64
Disregard this answer. I was wrong
B C F are the right answers:
BC:
F:
The address block fc00::/7 is divided into two parts, fc00::/8 and fd00::/8.
The block fc00::/8 is undefined. It has been proposed to be managed by an allocation authority, but this has not gained acceptance in the IETF.[4][5][6].
The block fd00::/8 is defined for /48 prefixes, formed by setting the forty bits of the prefix following fd to a randomly generated bit string. This results in the format fdxx:xxxx:xxxx:: for a prefix in this range. RFC 4193 offers a suggestion for generating the random identifier to obtain a minimum-quality result if the user does not have access to a good source of random numbers.
https://tools.ietf.org/html/rfc4193#section-3.1
First 8 bits is the prefix and L bit , next 40 bits is the global ID, next 16 bits is the subnet ID : C and B