Key Facts for Classes A, B, and C

Question 0

Class B total networks

Answer 0

2*14-2=16,384

Question 1

Class A Total Networks

Answer 1

2 *7-2=126

Question 2

Class C total networks

Answer 2

2*21-2=2,097,152

Question 3

Class A Default Mask

Answer 3

255.0.0.0

Question 4

Class B Default Mask

Answer 4

255.255.0.0

Question 5

Class C Default Mask

Answer 5

255.255.255.0