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Which of the following is a valid public IP address?

easy📝 Factual Q12 of 15
Computer Networks - IP Addressing
Which of the following is a valid public IP address?
A192.168.1.1
B8.8.8.8
C172.20.10.5
D10.0.0.1
Step-by-Step Solution
Solution:

  1. Step 1: Identify private IP addresses

    10.0.0.1, 192.168.1.1, and 172.20.10.5 are all within private IP ranges.

  2. Step 2: Check which IP is outside private ranges

    8.8.8.8 is a public IP address used by Google DNS servers.

  3. Final Answer:

    8.8.8.8 -> Option B

  4. Quick Check:

    Public IP example = 8.8.8.8 [OK]
Quick Trick: Public IPs are not in private ranges like 10., 172.16-31., 192.168. [OK]
Common Mistakes:
MISTAKES
  • Choosing private IPs as public by mistake
  • Not recognizing common public IPs like 8.8.8.8
  • Assuming all IPs starting with low numbers are private

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