100-150 Question 84
Select 3You are troubleshooting an issue in a network where IPv6 is being used. A device has the following IPv6 address: 2001:0db8:85a3:0000:0000:8a2e:0370:7334/64. Based on this address, which of the following statements are true about the IPv6 address and its prefix?
- A
The network prefix is 2001:0db8:85a3::/64.
- B
The device's interface identifier is 8a2e:0370:7334.
- C
The address is a unique local address (ULA).
- D
The address includes leading zeroes that can be omitted for a compressed format.
Show answer and explanation
Correct answers: A, B, D
Explanation
This IPv6 address is a global unicast address with a /64 prefix, meaning the first 64 bits represent the network portion. The remaining 64 bits form the interface identifier. It is not a unique local address, as its prefix falls within the global unicast range. Finally, leading zeroes in an IPv6 address can be omitted for simplification.
- A. Correct.
The network prefix is accurately derived from the first 64 bits of the IPv6 address, which are 2001:0db8:85a3::/64. This is the correct network prefix.
- B. Correct.
The interface identifier in an IPv6 address is represented by the last 64 bits. In this case, it is 8a2e:0370:7334.
- C. Incorrect.
This address is not a unique local address (ULA). ULAs fall within the range fc00::/7, whereas this address is part of the global unicast range (2000::/3).
- D. Correct.
IPv6 addresses allow leading zeroes in each 16-bit block to be omitted for a compressed format. For example, 0000 can be written as 0.