CCNA Network Infrastructure and Connectivity Practice Question
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 corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total 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.
What is the usable host range for subnet 10.1.1.192/27?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
10.1.1.193 to 10.1.1.222
A /27 subnet contains 32 total addresses. In plain language, the 10.1.1.192/27 block runs from 10.1.1.192 through 10.1.1.223. The first address is the network address and the last is the broadcast address, so the usable host range is 10.1.1.193 through 10.1.1.222.
This is a common subnetting question because it checks whether you can move from subnet boundary to valid host range. The key is to identify the block correctly and then exclude the reserved first and last addresses.
Key principle: A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
10.1.1.193 to 10.1.1.222
Why this is correct
This is correct because .192 is the network and .223 is the broadcast, leaving .193 through .222 as usable hosts.
Related concept
A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each.
✗
10.1.1.192 to 10.1.1.223
Why it's wrong here
This is wrong because those include the network and broadcast addresses.
When this WOULD be correct
This option would be correct if the question asked for the entire range of addresses within the subnet, including both the network and broadcast addresses, such as 'What is the address range for the subnet 10.1.1.192/27?'
✗
10.1.1.194 to 10.1.1.223
Why it's wrong here
This is wrong because it excludes one valid host and includes the broadcast address.
When this WOULD be correct
If the question were to ask for the usable host range of a different subnet, such as 10.1.1.192/26, then option C would be correct as the usable range would be from 10.1.1.193 to 10.1.1.254.
✗
10.1.1.160 to 10.1.1.191
Why it's wrong here
This is wrong because that range belongs to a different /27 subnet.
When this WOULD be correct
This option would be correct if the question asked for the range of addresses in a different subnet, such as 10.1.1.192/22, where the usable host range would indeed include addresses from 10.1.1.192 to 10.1.1.223.
Option-by-option analysis
Why each answer is right or wrong
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.
✓10.1.1.193 to 10.1.1.222Correct answer▾
Why this is correct
This is correct because .192 is the network and .223 is the broadcast, leaving .193 through .222 as usable hosts.
✗10.1.1.192 to 10.1.1.223Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because it includes the network address (10.1.1.192) and the broadcast address (10.1.1.223), which are not usable for hosts in a /27 subnet.
★ When this WOULD be the correct answer
This option would be correct if the question asked for the entire range of addresses within the subnet, including both the network and broadcast addresses, such as 'What is the address range for the subnet 10.1.1.192/27?'
Why candidates choose this
Candidates may choose this option due to confusion between usable host addresses and the overall address range of the subnet, leading them to mistakenly include the network and broadcast addresses.
✗10.1.1.194 to 10.1.1.223Wrong answer — click to see why▾
Why this is wrong here
Option C is incorrect because the usable host range for the subnet 10.1.1.192/27 starts at 10.1.1.193 and ends at 10.1.1.222, making 10.1.1.194 to 10.1.1.223 an invalid range since it includes the network and broadcast addresses.
★ When this WOULD be the correct answer
If the question were to ask for the usable host range of a different subnet, such as 10.1.1.192/26, then option C would be correct as the usable range would be from 10.1.1.193 to 10.1.1.254.
Why candidates choose this
Candidates may choose this option due to a misunderstanding of subnetting, mistakenly believing that the range can extend to include higher addresses without recognizing the need to account for the network and broadcast addresses.
✗10.1.1.160 to 10.1.1.191Wrong answer — click to see why▾
Why this is wrong here
This option is wrong because it includes the network address (10.1.1.192) and the broadcast address (10.1.1.223), which are not usable for hosts in the subnet 10.1.1.192/27.
★ When this WOULD be the correct answer
This option would be correct if the question asked for the range of addresses in a different subnet, such as 10.1.1.192/22, where the usable host range would indeed include addresses from 10.1.1.192 to 10.1.1.223.
Why candidates choose this
Candidates may choose this option due to confusion between the concepts of usable host ranges and the overall address range of a subnet, leading them to mistakenly include network and broadcast addresses.
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
Common exam trap: answer the scenario, not the keyword
A frequent exam trap is including the network or broadcast address as usable hosts. For example, selecting 10.1.1.192 or 10.1.1.223 as host IPs is incorrect because these addresses serve special roles: the network address identifies the subnet, and the broadcast address targets all hosts in the subnet. Candidates may also mistakenly shift the range by one address, either excluding valid hosts or including the broadcast address. This confusion often arises from not fully understanding subnet boundaries or the role of reserved addresses, leading to incorrect answers despite correctly identifying the subnet block.
Detailed technical explanation
How to think about this question
Subnetting is a fundamental concept in IP networking that divides a larger network into smaller, manageable segments called subnets. Each subnet is defined by a subnet mask, which determines the number of bits used for the network portion and the host portion of an IP address. In the case of a /27 mask, 27 bits are used for the network, leaving 5 bits for host addresses. This results in 2^5 = 32 total addresses per subnet block.
To identify the usable host range within a /27 subnet, you first determine the subnet block boundaries. For 10.1.1.192/27, the block starts at 10.1.1.192 and ends at 10.1.1.223. The first address (10.1.1.192) is the network address, and the last address (10.1.1.223) is the broadcast address. These two addresses cannot be assigned to hosts. Therefore, the usable host range is the addresses between them, from 10.1.1.193 to 10.1.1.222.
A common exam trap is confusing the network and broadcast addresses with usable hosts, leading to incorrect ranges. Cisco devices rely on correct subnetting to route traffic properly and avoid IP conflicts. In practical networking, assigning IPs within the usable range ensures devices communicate effectively without address overlap or broadcast issues. Mastery of subnet calculations is essential for CCNA candidates to design and troubleshoot IP networks accurately.
KKey Concepts to Remember
A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each.
The first address in any subnet is the network address and cannot be assigned to hosts because it identifies the subnet itself.
The last address in any subnet is the broadcast address and is reserved for sending packets to all hosts within that subnet.
The usable host range in a subnet excludes both the network and broadcast addresses, leaving the addresses in between for device assignment.
Subnetting requires calculating the subnet block size and identifying the network and broadcast addresses to determine valid host IPs.
Cisco devices use subnet masks to determine whether a destination IP is local or remote, affecting routing and forwarding decisions.
Misidentifying the network or broadcast address leads to common exam traps where candidates include invalid host addresses.
Understanding subnet boundaries and address allocation is critical for configuring IP addressing schemes in Cisco networks.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each.
Real-world example
How this comes up in practice
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 200-301 question in full detail.
Review a /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each., then practise related 200-301 questions on the same topic to reinforce the concept.
Network Infrastructure and Connectivity — This question tests Network Infrastructure and Connectivity — A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each..
What is the correct answer to this question?
The correct answer is: 10.1.1.193 to 10.1.1.222 — A /27 subnet contains 32 total addresses. In plain language, the 10.1.1.192/27 block runs from 10.1.1.192 through 10.1.1.223. The first address is the network address and the last is the broadcast address, so the usable host range is 10.1.1.193 through 10.1.1.222.
This is a common subnetting question because it checks whether you can move from subnet boundary to valid host range. The key is to identify the block correctly and then exclude the reserved first and last addresses.
What should I do if I get this 200-301 question wrong?
Review a /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
A /27 subnet mask corresponds to 255.255.255.224, which divides an IP address block into subnets containing 32 total addresses each.
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