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Exam 98-366 All Questions

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Exam 98-366 topic 1 question 51 discussion

Actual exam question from Microsoft's 98-366
Question #: 51
Topic #: 1
[All 98-366 Questions]

To which IP configuration does the CIDR notation 192.168.1.1/25 refer?

  • A. 192.168.1.1 255.255.255.64
  • B. 192.168.1.1 255.255.255.1
  • C. 192.168.1.1 255.255.255.32
  • D. 192.168.1.1 255.255.255.256
  • E. 192.168.1.1 255.255.255.128
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Suggested Answer: E 🗳️

Reference: http://www.subnet-calculator.com/

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xipherpk
3 years, 4 months ago
magic number is 128
upvoted 1 times
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ThabangMafa
4 years, 3 months ago
How do we get to 128?
upvoted 1 times
lewistoyemcg
4 years, 2 months ago
this is a rather easy example to work out/guess. since its 25 this means there are 25 1s at the beginning of the subnet mask /24 is 255.255.255.0 or class c subnet mask. /25 is 1 one in the 4th octet. which is 128. /26 would be two 1s in the fourth octet which would be 192 (168+64). /32 would be a 1 in all 8 bits in the 4th octet which would be 255 (128+64+32+16+8+4+2+1) again in the fourth octet, /32 means 32 1s for all 32 bits of the entire ip address. In the real world use a calculator but I hope i kindve explained how to do the math for the exam? Its easier to understand that explain unfortunately which is the problem with this. when you get it you just get it then. I was taught it 3 times in 3 different courses before it clicked.
upvoted 3 times
Ncvessey101
3 years, 8 months ago
thank you
upvoted 1 times
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Ciupaz
4 years, 7 months ago
Best to use this: http://www.subnet-calculator.com/cidr.php
upvoted 1 times
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