Cisco 100-105 Exam

How many bits are contained in each field of an IPv6 address?

  • A. 24
  • B. 4
  • C. 8
  • D. 16
Answer: Option D.
Explanation: 8026003d.pdf
One of the key advantages IPv6 brings is the exponentially larger address space. The following will outline the basic address architecture of IPv6.
128-bit-long addresses
Represented in hexadecimal format:
Uses CIDR principles: prefix/prefix length
x:x:x:x:x:x:x:x, where x is a 16-bit hex field
The last 64 bits are used for the interface ID

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