IPv6 Address Fields | Exam 200-125 | Cisco Certified Network Associate Exam

### Question

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

### Explanations

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A. B. C. D.

D

The correct answer is none of the above. Each field in an IPv6 address contains 16 bits, which means that an IPv6 address contains a total of 128 bits.

IPv6 (Internet Protocol version 6) is the most recent version of the Internet Protocol, designed to replace IPv4. While IPv4 addresses are 32-bit addresses (divided into four octets of 8 bits each), IPv6 addresses are 128-bit addresses, and they are represented as eight groups of four hexadecimal digits, separated by colons.

For example, an IPv6 address might look like this: 2001:0db8:85a3:0000:0000:8a2e:0370:7334

Each group of four hexadecimal digits represents 16 bits of the address. So, in this example, there are eight groups of 16 bits, for a total of 128 bits.

To summarize, each field of an IPv6 address contains 16 bits, and an IPv6 address contains a total of 128 bits.