Cisco 200-125 Exam

Which IPv6 address is valid?

  • A. 2001:0db8:0000:130F:0000:0000:08GC:140B
  • B. 2001:0db8:0:130H::87C:140B
  • C. 2031::130F::9C0:876A:130B
  • D. 2031:0:130F::9C0:876A:130B
Answer: Option D.
Explanation: 

An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:).
An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The leading 0’s in a group can be collapsed using ::, but this can only be done once in an IP address.

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