Exam-style question
Try this first
What is the main purpose of a subnet mask?.
- A.To identify the network identifier part of an IP address
- B.To encrypt the data sent across a network
- C.To identify the application being used
- D.To convert an IP address into a domain name
Model answer
What a good answer should say
- To identify the network identifier part of an IP address
Explanation
Why this works
A subnet mask shows which bits of an IP address belong to the network identifier and which bits do not.
Common mistake
No common mistake is linked to this question yet.