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CompTIA Exam N10-009 Topic 2 Question 19 Discussion

Actual exam question for CompTIA's N10-009 exam
Question #: 19
Topic #: 2
[All N10-009 Questions]

A network administrator needs to assign IP addresses to a newly installed network. They choose 192.168.1.0/24 as their network address and need to create three subnets with 30 hosts on each subnet. Which of the following is a valid subnet mask that will meet the requirements?

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Suggested Answer: B

To create three subnets with at least 30 hosts each:

Subnet Calculation: Each subnet must support 32 addresses (30 usable + 2 reserved for network and broadcast).

Bits for Subnets: Subnet mask 255.255.255.192 (/26) provides 64 addresses per subnet (4 subnets total).

Valid Subnets: Each subnet provides sufficient IPs to meet the requirement.

255.255.255.128 (A): Creates only 2 subnets, not enough for the requirement.

255.255.255.224 (C): Provides 8 subnets but only 30 addresses per subnet (28 usable), insufficient for hosts.

255.255.255.240 (D): Too restrictive, only 16 addresses per subnet (14 usable).


by Lacresha at Jan 26, 2025, 01:15 AM

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Annamae
1 months ago
I've got it! The subnet mask needs to accommodate 30 hosts per subnet, so the answer is C. Nailed it!
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Valentine
28 days ago
Actually, the correct answer is C) 255.255.255.224
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Kenneth
29 days ago
I think the answer is A) 255.255.255.128
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Denae
2 months ago
I'm leaning towards C) 255.255.255.224 because it gives us 30 hosts per subnet, meeting the requirements.
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Yvonne
2 months ago
I disagree, I believe the correct answer is B) 255.255.255.192 as it provides 62 hosts per subnet.
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Charlette
2 months ago
Ha! This is like a secret code, but for networking. I wonder if the answer is hidden in the matrix.
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Lonny
2 months ago
Okay, let's see... 30 hosts per subnet, so the subnet mask needs to allow for that. I'm thinking B or C could work.
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Venita
2 months ago
I think the answer is A) 255.255.255.128 because it allows for 126 hosts per subnet.
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Tegan
2 months ago
Hmm, this is tricky. I'll have to think about the subnet mask requirements carefully.
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Thurman
2 months ago
User 2: No, I believe it should be 255.255.255.240
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Maryrose
2 months ago
User 1: I think the correct subnet mask is 255.255.255.224
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