CIW™ Foundations Exam Practice Questions

Default IP Subnet Mask

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Q7. You are given an IP address 154.54.12.36. What is the default subnet mask?

A. 255.0.0.0

B. 255.255.0.0

C. 255.255.255.0

D. 255.255.255.255

Correct Answer: B

Explanation:

The default subnet mask for
Class A network: 255.0.0.0
Class B network 255.255.0.0
Class C network 255.255.255.0

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