Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?
A. Router (config) #ip classless
B. Router (config) #no ip classful
C. Router (config) #ip unnumbered
D. Router (config) #ip subnet-zero
Answer: Option D
Solution(By Examveda Team)
A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the commandip subnet-zero
is not used, then only 6 subnets would be available for use. Related Questions on Subnetting
A. 1 only
B. 2 and 3 only
C. 3 and 4 only
D. None of the above
E. 2 and 5 only
A. 1 and 3
B. 2 and 4
C. 1, 2 and 4
D. 2, 3 and 4
E. 2 and 5 only
A. 1 only
B. 2 only
C. 3 and 4 only
D. 1 and 5 only
E. 2 and 5 only
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