Quick Answer
The answer is mesh topology, as it provides the highest level of redundancy and fault tolerance among all network designs. This is because a full mesh topology creates a dedicated point-to-point link between every pair of nodes, resulting in n(n-1)/2 total connections for n nodes. This architecture eliminates any single point of failure, so if one link or node goes down, traffic can be instantly rerouted through multiple alternative paths, ensuring continuous network operation. On the CompTIA Network+ N10-009 exam, this concept tests your understanding of network resilience and often appears in questions contrasting mesh with star or bus topologies. A common trap is confusing partial mesh with full mesh—remember that only full mesh offers true maximum path diversity. For a quick memory tip, think of a spider web: every strand connects to every other strand, so cutting one never traps the spider.
This N10-009 practice question tests your understanding of networking concepts. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. 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.
Which of the following network topologies provides the highest level of redundancy and fault tolerance?
Star
Why wrong: A star topology has a single point of failure at the central device.
Bus
Why wrong: A bus topology is susceptible to failures along the single cable and lacks redundancy.
Ring
Why wrong: A ring topology can provide redundancy with dual rings, but a single ring fails if one link breaks.
Mesh
A mesh topology offers multiple redundant paths, providing the highest fault tolerance.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Mesh
A mesh topology provides the highest level of redundancy and fault tolerance because every node has a dedicated point-to-point connection to every other node. This means that if any single link or node fails, traffic can be immediately rerouted through multiple alternative paths without any single point of failure. In a full mesh, the number of links is n(n-1)/2, ensuring maximum path diversity and resilience.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Star
Why it's wrong here
A star topology has a single point of failure at the central device.
Bus
Why it's wrong here
A bus topology is susceptible to failures along the single cable and lacks redundancy.
Ring
Why it's wrong here
A ring topology can provide redundancy with dual rings, but a single ring fails if one link breaks.
Mesh
Why this is correct
A mesh topology offers multiple redundant paths, providing the highest fault tolerance.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Cisco often tests the misconception that a ring topology (especially a dual-ring like FDDI) offers the highest fault tolerance, but candidates must remember that a full mesh provides more redundant paths and no single point of failure, whereas even a dual ring can be disrupted by multiple simultaneous failures.
Detailed technical explanation
Under the hood, mesh topologies are often implemented using protocols like OSPF or IS-IS, which dynamically calculate the shortest path and can quickly converge around failures using link-state advertisements (LSAs). In real-world scenarios, mesh networks are used in critical infrastructure such as military communications or data center spine-leaf architectures, where the cost of additional cabling and ports is justified by the need for near-zero downtime. The trade-off is high cost and complexity, as each node requires a dedicated interface for every other node, making full meshes impractical beyond small deployments.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
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FAQ
Networking Concepts — This question tests Networking Concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Mesh — A mesh topology provides the highest level of redundancy and fault tolerance because every node has a dedicated point-to-point connection to every other node. This means that if any single link or node fails, traffic can be immediately rerouted through multiple alternative paths without any single point of failure. In a full mesh, the number of links is n(n-1)/2, ensuring maximum path diversity and resilience.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
This N10-009 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the N10-009 exam.
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