Fermi question · Technology
About how many distinct addresses are possible in the 32-bit IPv4 address space?
Make a fast, defensible estimate before you reveal the reference answer. Think in factors, not exact recall.
What is your estimate?
Your result will appear here after you submit a guess.
Reference answer
Reveal the reference answer
≈ 4.29 billion addresses
Fermi estimates are judged by scale, so a reasonable approximation can still earn a strong score.
One way to estimate it
A 32-bit field has two choices for each bit, so the address-space size is 2³².
- Bits32
- Possible values2³²
- Estimate≈ 4.3 × 10⁹ addresses
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