This 200-301 practice question tests your understanding of network infrastructure and connectivity. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. A key principle to apply: a /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each.. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A host has the address 10.10.10.94/27. Which subnet contains that host?
10.10.10.32/27
Why wrong: This is wrong because the 32/27 subnet covers addresses 32 through 63, not 94.
10.10.10.64/27
This is correct because 94 falls within the 64 through 95 range.
10.10.10.96/27
Why wrong: This is wrong because the 96/27 subnet begins above the host address.
10.10.10.0/27
Why wrong: This is wrong because the 0/27 subnet covers only 0 through 31.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
10.10.10.64/27
A /27 mask creates subnets in blocks of 32 addresses. In plain language, that means the fourth-octet ranges are 0–31, 32–63, 64–95, 96–127, and so on. Since the host address ends in 94, it falls inside the 64–95 block. That means the subnet is 10.10.10.64/27. This is a classic subnetting task because it checks whether you can move from prefix length to block size and then locate the host inside the correct range. The key skill is recognizing the increment boundary and not guessing based only on the nearest familiar address.
Key principle: A /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
10.10.10.32/27
Why it's wrong here
This is wrong because the 32/27 subnet covers addresses 32 through 63, not 94.
When this WOULD be correct
If the question asked which subnet contains the address 10.10.10.32 or any address within the range of 10.10.10.32 to 10.10.10.63, then option A would be the correct answer, as it would directly correspond to that subnet.
10.10.10.64/27
Why this is correct
This is correct because 94 falls within the 64 through 95 range.
Related concept
A /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each.
10.10.10.96/27
Why it's wrong here
This is wrong because the 96/27 subnet begins above the host address.
When this WOULD be correct
If the question asked for the subnet that includes the address 10.10.10.96 specifically, then option C would be correct, as it would represent the subnet containing that address.
10.10.10.0/27
Why it's wrong here
This is wrong because the 0/27 subnet covers only 0 through 31.
When this WOULD be correct
If the question asked for the subnet that contains the address 10.10.10.0 itself, or if it specified the network address for a different subnetting scheme that included 10.10.10.0, then option D would be correct.
Option-by-option analysis
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The 200-301 exam frequently reuses these exact scenarios with slightly different constraints.
Why this is correct
This is correct because 94 falls within the 64 through 95 range.
Why this is wrong here
The subnet 10.10.10.32/27 covers addresses 10.10.10.32 through 10.10.10.63. The host address 10.10.10.94 is not within this range, so this subnet is incorrect.
★ When this WOULD be the correct answer
If the question asked which subnet contains the address 10.10.10.32 or any address within the range of 10.10.10.32 to 10.10.10.63, then option A would be the correct answer, as it would directly correspond to that subnet.
Why candidates choose this
Students might mistakenly think that because 94 is close to 64, it could be in the 32/27 subnet, but they forget that the subnet boundaries are multiples of 32.
Why this is wrong here
The subnet 10.10.10.96/27 covers addresses 10.10.10.96 through 10.10.10.127. The host address 10.10.10.94 is below the starting address of this subnet, so it is not included.
★ When this WOULD be the correct answer
If the question asked for the subnet that includes the address 10.10.10.96 specifically, then option C would be correct, as it would represent the subnet containing that address.
Why candidates choose this
Students might incorrectly assume that 94 is close to 96 and could be in that subnet, but they overlook that the subnet starts at 96, not 94.
Why this is wrong here
The subnet 10.10.10.0/27 covers addresses 10.10.10.0 through 10.10.10.31. The host address 10.10.10.94 is far outside this range, so this subnet is incorrect.
★ When this WOULD be the correct answer
If the question asked for the subnet that contains the address 10.10.10.0 itself, or if it specified the network address for a different subnetting scheme that included 10.10.10.0, then option D would be correct.
Why candidates choose this
Students might think that any address starting with 10.10.10 could be in the 0/27 subnet, but they fail to consider the subnet mask and the resulting address range.
Analysis generated from the official 200-301blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Avoid guessing based on familiar numbers; calculate the subnet range using the block size.
Detailed technical explanation
Subnetting is a fundamental concept in IP networking that divides a larger network into smaller, manageable subnetworks. A subnet mask, such as /27, determines how many bits are used for the network portion and how many for the host portion of the IP address. Specifically, a /27 mask uses 27 bits for the network, leaving 5 bits for host addresses, which creates subnets with 32 IP addresses each (2^5 = 32). This division helps optimize IP address allocation and improves network performance and security. To determine which subnet contains a specific host address, you calculate the subnet ranges based on the subnet mask. For a /27 mask, subnets increment in blocks of 32 addresses starting from 0. For example, the subnets are 0–31, 32–63, 64–95, 96–127, and so forth. The host address 10.10.10.94 falls within the 64–95 range, making 10.10.10.64/27 the correct subnet. This method ensures precise identification of the subnet and avoids misclassification. A common exam trap is confusing the subnet ranges or assuming the host address belongs to the nearest subnet numerically rather than calculating the exact block. For instance, mistakenly selecting 10.10.10.96/27 because 94 is close to 96 overlooks the subnet increments defined by the mask. In practical Cisco networking, accurate subnetting is critical for routing, access control, and network segmentation, making this skill essential for CCNA candidates to master.
Key takeaway
A /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each.
Real-world example
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Review a /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each., then practise related 200-301 questions on the same topic to reinforce the concept.
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FAQ
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — A /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each..
The correct answer is: 10.10.10.64/27 — A /27 mask creates subnets in blocks of 32 addresses. In plain language, that means the fourth-octet ranges are 0–31, 32–63, 64–95, 96–127, and so on. Since the host address ends in 94, it falls inside the 64–95 block. That means the subnet is 10.10.10.64/27. This is a classic subnetting task because it checks whether you can move from prefix length to block size and then locate the host inside the correct range. The key skill is recognizing the increment boundary and not guessing based only on the nearest familiar address.
Review a /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each., then practise related 200-301 questions on the same topic to reinforce the concept.
A /27 subnet mask uses 27 bits for the network and 5 bits for hosts, creating subnets with 32 IP addresses each.
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Last reviewed: May 17, 2026
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