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 /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.. 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 with address 192.168.1.130/26 needs to identify its local subnet. Which subnet does it belong to?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
192.168.1.128/26
A /26 creates subnets in blocks of 64 addresses each. In plain language, that means the fourth octet ranges are 0–63, 64–127, 128–191, and 192–255. Since 192.168.1.130 falls within the 128–191 block, the host belongs to the 192.168.1.128/26 subnet. That is the local network boundary the host will use to decide what is on-link and what requires the default gateway.
This kind of question is a very common CCNA subnetting task. The main challenge is not the arithmetic itself but recognizing the block size and locating the destination inside the correct range. Once you know a /26 moves in increments of 64, the right subnet becomes much easier to see.
Key principle: A /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
192.168.1.0/26
Why it's wrong here
This is wrong because the 0/26 subnet covers addresses 0 through 63, which does not include 130.
When this WOULD be correct
If the question asked for the first subnet in a series of subnets created from the 192.168.1.0 network with a /26 mask, then 192.168.1.0/26 would be the correct answer, as it represents the first subnet in that range.
✗
192.168.1.64/26
Why it's wrong here
This is wrong because the 64/26 subnet covers 64 through 127, which also does not include 130.
When this WOULD be correct
If the question asked which subnet 192.168.1.130 belongs to under a different subnet mask, such as /25, then option B (192.168.1.64/26) would be correct, as it would encompass the range including 192.168.1.130.
✓
192.168.1.128/26
Why this is correct
This is correct because 130 falls within the 128 through 191 range of the 192.168.1.128/26 subnet.
Related concept
A /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.
✗
192.168.1.192/26
Why it's wrong here
This is wrong because the 192/26 subnet begins at 192 and covers 192 through 255.
When this WOULD be correct
If the question asked which subnet a host with an address of 192.168.1.194 belongs to, then option D would be correct, as 192.168.1.194 is within the range of the 192.168.1.192/26 subnet.
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.
✓192.168.1.128/26Correct answer▾
Why this is correct
This is correct because 130 falls within the 128 through 191 range of the 192.168.1.128/26 subnet.
✗192.168.1.0/26Wrong answer — click to see why▾
Why this is wrong here
Option A is incorrect because the address 192.168.1.130 falls within the subnet range of 192.168.1.128/26, not 192.168.1.0/26, which covers addresses from 192.168.1.0 to 192.168.1.63.
★ When this WOULD be the correct answer
If the question asked for the first subnet in a series of subnets created from the 192.168.1.0 network with a /26 mask, then 192.168.1.0/26 would be the correct answer, as it represents the first subnet in that range.
Why candidates choose this
Candidates may choose this option because it represents the base address of the subnetting scheme, leading to confusion about the relationship between the base address and the specific host address.
✗192.168.1.64/26Wrong answer — click to see why▾
Why this is wrong here
Option B, 192.168.1.64/26, is incorrect because the host 192.168.1.130 falls within the subnet range of 192.168.1.128 to 192.168.1.191, not 192.168.1.64 to 192.168.1.127.
★ When this WOULD be the correct answer
If the question asked which subnet 192.168.1.130 belongs to under a different subnet mask, such as /25, then option B (192.168.1.64/26) would be correct, as it would encompass the range including 192.168.1.130.
Why candidates choose this
Candidates might choose this option due to a misunderstanding of subnet ranges, mistakenly believing that any /26 subnet could apply to the address without calculating the specific range it belongs to.
✗192.168.1.192/26Wrong answer — click to see why▾
Why this is wrong here
Option D, 192.168.1.192/26, is incorrect because the host address 192.168.1.130 falls within the subnet range of 192.168.1.128 to 192.168.1.191, making it part of the 192.168.1.128/26 subnet, not 192.168.1.192/26.
★ When this WOULD be the correct answer
If the question asked which subnet a host with an address of 192.168.1.194 belongs to, then option D would be correct, as 192.168.1.194 is within the range of the 192.168.1.192/26 subnet.
Why candidates choose this
Candidates may choose this option due to the proximity of the address ranges, leading them to mistakenly associate it with the correct subnet without fully analyzing the 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
Common exam trap: answer the scenario, not the keyword
Be careful to calculate subnet ranges accurately and avoid assuming proximity based on the first or last octet.
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 /26 mask, 26 bits are allocated for the network, leaving 6 bits for host addresses, which results in subnets containing 64 IP addresses each (2^6 = 64). This segmentation helps improve network performance and security by limiting broadcast domains and organizing IP address allocation.
To determine the subnet a host belongs to, you calculate the subnet ranges based on the block size derived from the subnet mask. For a /26 mask, the IP address space is divided into four subnets within the 192.168.1.0 network: 192.168.1.0/26 (0-63), 192.168.1.64/26 (64-127), 192.168.1.128/26 (128-191), and 192.168.1.192/26 (192-255). The host IP 192.168.1.130 falls within the 128-191 range, so it belongs to the 192.168.1.128/26 subnet. This subnetting logic is essential for routing decisions and determining whether traffic is local or requires forwarding to a gateway.
A frequent confusion arises when candidates overlook the subnet block size or misinterpret the subnet mask, leading to incorrect subnet identification. In practical Cisco networking, devices use the subnet mask to perform bitwise AND operations with the IP address to find the network address. Miscalculations can cause routing errors or connectivity issues. Understanding the relationship between subnet masks, block sizes, and IP address ranges ensures accurate subnet determination and efficient network design, which is vital for CCNA certification and real-world network management.
KKey Concepts to Remember
A /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.
A host IP address belongs to the subnet whose address range includes the host's IP after applying the subnet mask.
Subnetting uses bitwise AND operations between the IP address and subnet mask to determine the network address.
The subnet 192.168.1.128/26 covers IP addresses from 192.168.1.128 to 192.168.1.191, including the host 192.168.1.130.
Incorrectly identifying subnet boundaries often results from misunderstanding the block size created by the subnet mask.
Cisco devices use subnet masks to decide if a destination IP is local or requires routing via a default gateway.
Subnetting improves network efficiency by segmenting broadcast domains and organizing IP address allocation.
Recognizing subnet increments based on mask length is critical for accurate subnet identification on the CCNA exam.
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 /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
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 /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet., 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 /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet..
What is the correct answer to this question?
The correct answer is: 192.168.1.128/26 — A /26 creates subnets in blocks of 64 addresses each. In plain language, that means the fourth octet ranges are 0–63, 64–127, 128–191, and 192–255. Since 192.168.1.130 falls within the 128–191 block, the host belongs to the 192.168.1.128/26 subnet. That is the local network boundary the host will use to decide what is on-link and what requires the default gateway.
This kind of question is a very common CCNA subnetting task. The main challenge is not the arithmetic itself but recognizing the block size and locating the destination inside the correct range. Once you know a /26 moves in increments of 64, the right subnet becomes much easier to see.
What should I do if I get this 200-301 question wrong?
Review a /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet., then practise related 200-301 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
A /26 subnet mask divides the IP address space into blocks of 64 addresses, defining the size of each subnet.
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