Which of the following IPv6 addresses appears to be a global unicast address, based on its first few hex digits?
- 3123:1:3:5::1
- FE80::1234:56FF:FE78:9ABC
- FDAD::1
- FF00::5
Explanation: Global unicast addresses can begin with many different initial values, but most commonly begin with either a hex 2 or 3.
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