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Question
Which of the following best illustrates the default subnet mask for a class A,B, and C Network?
Options:
A .  255.255.255.0, 255.255.0.0, 255.0.0.0
B .  255.0.0.0, 255.255.0.0, 255.255.255.0
C .  0.0.0.0, 0.0.0.1, 0.0.1.1
D .  None of these
E .  255.255.0.0, 255.255.255.0, 255.255.255.255
Answer: Option B

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