What Must Be Considered When Designing a High-Availability Network?

SY0-701 By islever Editorial Last updated

Short answer

AD Ease of recovery Responsiveness

Question

Which of the following must be considered when designing a high-availability network? (Choose two).
  1. Ease of recovery Correct Answer
  2. Ability to patch
  3. Physical isolation
  4. Responsiveness Correct Answer
  5. Attack surface

Key Takeaways

Tests the ability to distinguish between true high-availability operational metrics and general security or redundancy concepts, with the common trap being the misapplication of physical isolation as a primary HA driver.

This question examines the core principles of maintaining continuous service during system failures. Community consensus strongly supports ease of recovery and responsiveness as the defining characteristics of high-availability design, despite significant debate over physical isolation.

Common mistake: Many candidates incorrectly choose Physical Isolation (Option C), confusing hardware redundancy or air-gapping with high-availability requirements, while failing to recognize that responsiveness and recovery speed are the direct determinants of minimized downtime.

Expert Analysis

High Availability vs. General Redundancy

High availability (HA) specifically targets minimizing unplanned downtime and ensuring continuous service delivery. While redundancy provides backup components, HA design focuses on how quickly and smoothly those backups activate and restore functionality.

Why Ease of Recovery and Responsiveness Are Correct

Ease of recovery (A) directly addresses the Recovery Time Objective (RTO), ensuring that automated failover and restoration processes are straightforward and fast. Responsiveness (D) guarantees that the network dynamically adjusts to traffic shifts, component failures, or maintenance windows without degrading user experience. As noted in community discussions, these two factors work together to maintain uptime during active disruptions.

Why the Remaining Options Are Incorrect

Ability to patch (B) relates to vulnerability management and security compliance, not continuous operation. Physical isolation (C) is primarily a security control for preventing unauthorized access or lateral movement; while it can contribute to fault tolerance, it does not inherently solve recovery speed or load-handling capabilities. Attack surface (E) focuses on risk reduction and threat mitigation rather than availability engineering. Several candidates selected AC due to conflating HA with hardware-level redundancy, but modern HA architectures prioritize automated recovery and real-time responsiveness over static physical separation.

Official Reference

https://csrc.nist.gov/publications/detail/sp/800-34/rev-1/final

This link opens the official vendor documentation in a new tab.

Exam Strategy

When tackling high-availability questions, prioritize options that directly measure uptime, failover speed, and user experience during disruptions. Filter out answers that describe preventive security controls, routine maintenance tasks, or static hardware configurations unless they explicitly mention continuous operation or automated recovery mechanisms.

Community Votes

AD
76%
AC
24%

76% of anonymous learners picked answer AD. Votes are pick records left by other test-takers — they are not the verified answer.

Discussion 22 contributions

Compiled from public community threads and reader submissions, lightly edited for clarity. Handles and vote tallies are shown as recorded, and comments reflect the views of individual contributors.

From public community threads 22

  1. Etc_Shadow28000 👍 19
    When designing a high-availability network, two key considerations are: A. Ease of recovery D. Responsiveness - Ease of recovery. This is essential for high availability because the network must be able to recover quickly from failures to minimize downtime. - Responsiveness. Ensuring that the network can handle high traffic loads and respond quickly to user requests is crucial for maintaining high availability. Other factors like physical isolation, ability to patch, attack surface, and extensible authentication are important for security and maintenance but are not primary considerations for high availability. Therefore, the correct answers are: A. Ease of recovery D. Responsiveness
  2. MarDog 👍 7
    A. Ease of Recovery and C. Physical Isolation
  3. ILOVECOMPTIA 👍 4
    Ease of recovery = HA Ability to patch = security Physical isolation = HA (because nobody can touch it) Responsiveness = Performance Attack surface = Security Extensible authentication = Security
  4. NONS3c 👍 3
    A. Ease of recovery High availability requires systems to recover quickly and easily in case of failure. This ensures minimal downtime and fast restoration of services. D. Responsiveness A high-availability network must respond quickly to changes or failures to maintain uptime. This includes quick failover mechanisms and the ability to rapidly address network issues.
  5. 3330278_111 👍 2
    I was pretty confident about AD at first. However, availability focuses on minimizing downtime and ensuring continuous operation. Physical Isolation provides redundancy and protection against failures, which is a fundamental aspect of high availability, ensuring that issues in one part of the network do not impact the overall availability of services. Physical isolation helps prevent a single point of failure from affecting the entire network. While responsiveness is important for performance, it is not specifically a high-availability consideration. High availability focuses on ensuring that systems remain operational and recover quickly from failures, rather than optimizing performance.
Show 17 more comments
  1. jaylom 👍 2
    The Answer should be A: Ease of recovery and C: Physical isolation. -I know that the answer says A and D, but think about it, responsiveness is built upon a working system, and If a single point of failure occurs, then responsiveness will mean nothing. The question asks what "must" be considered for availability, so A: Ease of recovery minimizes downtime and increases availability, and C: Physical isolation eliminates a single point of failure and provides availability. -Even though responsiveness is also important, it is still built upon a working system, and if a single point of failure occurs, then responsiveness will not matter.
  2. cri88 👍 2
    When designing a high-availability network, two key considerations are: Ease of recovery: This refers to the network’s ability to quickly and efficiently recover from failures or disruptions. Having redundant components, failover mechanisms, and well-defined recovery procedures in place is crucial1. Physical isolation: Ensuring that critical components are physically separated helps prevent single points of failure and enhances network resilience.
  3. CZAR88 👍 2
    ttack surface • How many ways into your home? – Doors, windows, basements • Everything can be a vulnerability – Application code – Open ports • Authentication process – Human error • Minimize the surface – Audit the code – Block ports on the firewall – Monitor network traffic in real-time
  4. tsummey 👍 2
    High availability focuses on redundancy, fault tolerance, and recovery mechanisms rather than just speed. The more correct answers remain Ease of recovery and Physical isolation, as they directly impact the ability of a network to remain operational despite failures.
  5. hashiranaide 👍 2
    I went with A and B, since the ability to apply patches without a downtime (e.g. by patching one node after the other) is one of the important features of a HA system
  6. e5c1bb5 👍 2
    struggling with this one. question too broad. Ease of recovery is important for availability so id go with that. not sure about responsiveness..
  7. hasquaati 👍 2
    I chose AD because High Availability also means Responsiveness, even when something stops working.
  8. cdsu 👍 2
    Why not A and E? Its a tuff question.
  9. dbrowndiver 👍 1
    High-availability networks require robust recovery processes to ensure that services can be restored rapidly after any failure, minimizing the impact on users and maintaining service continuity. Responsiveness is crucial for a high-availability network, as it ensures that the network can handle unexpected changes and continue delivering services efficiently, even under stress or during failures.
  10. slackbot 👍 1
    bad wording again. is this about high availability/resiliency or redundancy? A suggests redundancy C suggests redundancy D suggests resilience Question is asking about resiliency so, it looks like the only reasonable answer is D. Both A and C should not be correct. so, it would seem they are asking about redundancy, not resiliency in which case we get A and C good job again compTIA
  11. a4e15bd 👍 1
    A & D A. Ease of Recovery, ensure quick restoration after a failure. D. Responsiveness, ensures the network can handle the load and maintain availability
  12. leedsbarber 👍 1
    Like so many questions, it can be open to interpretation. I went for A and B, but I can certainly see an argument for A and D.
  13. Bito808 👍 1
    Think of doing an online purchase. Which would minimally affect your transaction? Which shortens system downtime?
  14. MaxiPrince 👍 1
    A & D Ease of recovery/Responsiveness
  15. 3dk1 👍 1
    Prof Messer's video explains it well.
  16. f26ddcd 👍 1
    A. Ease of recovery D. Responsiveness
  17. shady23 👍 1
    D. Responsiveness A. Ease of recovery

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