10.Can you explain the rationale behind the prefix 2000::/3 for global unicast addresses in IPv6 and how it ensures a specific range for the first byte of the address?
The prefix 2000::/3 is designated for global unicast addresses in IPv6. The 2000::/3 prefix in binary is 0010 0000 0000 0000, where the first three bits are 001. Therefore, any global unicast address falling under the 2000::/3 prefix will have a first hexadecimal digit either 2 or 3, providing a structured and globally unique allocation of IPv6 addresses.
