Computer Networking
Which of the following best illustrates the default subnet mask for a class A,B, and C Network?

None of these
255.0.0.0, 255.255.0.0, 255.255.255.0
255.255.0.0, 255.255.255.0, 255.255.255.255
0.0.0.0, 0.0.0.1, 0.0.1.1
255.255.255.0, 255.255.0.0, 255.0.0.0

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