Exam-style question
Try this first
An IP address is 192.168.1.70 and the subnet mask is 255.255.255.192. How many bits of the IP address are identified as the network part by this mask?.
- A.8 bits
- B.16 bits
- C.24 bits
- D.26 bits
Model answer
What a good answer should say
- 26 bits
Explanation
Why this works
The first three octets of 255.255.255.192 contain 24 network bits. The value 192 in the final octet is 11000000 in binary, adding two more network bits, for a total of 26.
Common mistake
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