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Exam N10-009 topic 1 question 62 discussion

Actual exam question from CompTIA's N10-009
Question #: 62
Topic #: 1
[All N10-009 Questions]

A security administrator is creating a new firewall object for a device with IP address 192.168.100.1/25. However, the firewall software only uses dotted decimal notation in configuration fields. Which of the following is the correct subnet mask to use?

  • A. 255.255.254.0
  • B. 255.255.255.1
  • C. 255.255.255.128
  • D. 255.255.255.192
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Suggested Answer: C 🗳️
by HeatSquad77 at Dec. 27, 2024, 6:05 p.m.

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HeatSquad77
2 weeks ago
Selected Answer: C
/25 in binary looks like this...11111111.11111111.11111111.10000000...if you count all the ones it adds up to 255.255.255.128
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