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You are a network administrator and have been assigned the
IP address of 201.222.5.0. You need to have 20 subnets with
5 hosts per subnet. What subnet mask will you use?
A. 255.255.255.248
B. 255.255.255.128
C. 255.255.255.192
D. 255.255.255.240
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Answer Posted / guest
Answer: A
By borrowing 5 bits from the last octet, you can.
have 30 subnets. If you borrowed only 4 bits you could only
have 14 subnets. The formula is (2 to the power of n)-2.
By borrowing 4 bits, you have (2x2x2x2)-2=14. By borrowing
5 bits, you have (2x2x2x2x2)-2=30. To get 20 subnets, you
would need to borrow 5 bits so the subnet mask would be
255.255.255.248.
| Is This Answer Correct ? | 9 Yes | 2 No |
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