HomeCCNA Network Exam Prep 2026Question 1 of 10
CCNA Network Exam Prep 2026Question 1 / 10

What is the prefix for the following IPv6 address: 2001:0db8:85a3::8a2e:0370:7334 / 48?

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✓ Correct answer: D. 2001:0db8:85a3:: / 48 To identify the prefix (subnet ID) in an IPv6 address with a prefix length that is divisible by 4, take the prefix length and divide it by 4 to find the number of hex digits that are in the prefix. Then, change all hex digits after that and change them to 0. If the prefix length is 48, then the first 12 digits are in the prefix.

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