# Subnetting Speed Practice at CCENTSkills

Just a heads up, for those of you who are past the ICND1 exam and CCENT. I just posted a new subnetting practice question at the CCENTSkills blog, and answers. Of course, subnetting matters a lot on both ICND1 and ICND2, so just wanted to make sure you saw it if interested. That’s it!

Wendell

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Patrick
February 8, 2012 2:08 pm

Which two addresses can be assigned to a host with a subnet mask of 255.255.254.0? (Choose two)
A. 113.10.4.0
B. 186.54.3.0
C. 175.33.3.255
D. 26.35.2.255
E. 17.35.36.0
subnet increment is 2, subnet mask is 23
so, host range will be from 2.1 to 3.254, and … so, the answer is B and D.

why do we have to start at 2 why cant the range be 0.1 1.255 ? is the question assuming no ip subnet zero is being used?

Mike
February 21, 2023 4:02 pm

Magic number is 2

So A (113.10.4.0) would be a subnet ID (multiple of magic number in 3d octet with 0 in 4th)
B (186.54.3.0) could be a host (subnet ID 186.54.2.0, host addresses from 186.54.2.1 – 186.54.3.254, broadcast 186.54.3.255)
D could be a host
E would be a subnet ID (multiple of magic number in 3d octet with a 0 in the 4th octet)

I’d say B and D. Hope my logic is sound.