**From which IP Class, subnet mask 255.255.255.0 belongs to?**

(a). Class A
(b). Class B
(c ). Class C
(d). May be from (a), (b), (c ).

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(d).
Explanation: Well, 255.255.255.0 is default subnet mask for Class C IPs but it can also belongs to Class A and Class B IPs after subnetting.

the correct answer is C option