Free Designing and Implementing Enterprise Network Assurance Practice Questions

Sample Practice Questions

Try these 10 sample questions from the Designing and Implementing Enterprise Network Assurance practice bank. Each includes the answer and explanation. Continue with the interactive practice above to review the full question set.

1. 1A team needs geographically distributed, outside-in monitoring of a public application without deploying or administering monitoring hosts. Which ThousandEyes deployment meets these requirements?

   1. A. Use Enterprise Agents on team-managed virtual machines in each region.
   2. B. Use Cloud Agents at the required available monitoring locations.
   3. C. Use Endpoint Agents installed on employee laptops in each region.
   4. D. Use Enterprise Agents on team-managed routers in each region.

   Answer: B

   Explanation: The documentation states, "Cloud Agents are installed and maintained by ThousandEyes, and are available immediately to customers to configure tests, with no administrative responsibilities." Cloud Agents supply the required external vantage points without customer-managed hosts. The other deployments require customer installations.

   Reference: Global Vantage Points — Comparison of Agent Types > Cloud Agents

2. 2During Enterprise Agent installation, which value links the new agent to the intended ThousandEyes account group?

   1. A. The descriptive hostname assigned to the agent.
   2. B. The account group token from the installation panel.
   3. C. The target application's HTTP authentication password.
   4. D. The public IP address of the agent's default gateway.

   Answer: B

   Explanation: The installation guide states, "The account group token is the unique key that links an Enterprise Agent to a ThousandEyes account group." Supply the intended group's token and protect it as a secret. Hostnames, target credentials, and gateway addresses do not perform this account-group binding.

   Reference: Getting Started with Cloud and Enterprise Agents — Adding a New Enterprise Agent, account group token note

3. 3During a slowdown, a WAN interface runs near its capacity and its output discards rise. Physical-interface error counts remain unchanged. Which cause is most directly supported by these observations?

   1. A. Ingress resource exhaustion indicated by input packet discards.
   2. B. Network connection saturation at the egress interface.
   3. C. A physical link fault indicated by increasing interface errors.
   4. D. A routing flap indicated by repeated prefix withdrawals.

   Answer: B

   Explanation: The metrics guide states, "Output packet discards typically indicate network connection saturation." Near-capacity traffic and rising output discards specifically support egress congestion. Input discards identify a different counter direction, physical errors are unchanged, and the supplied data contains no repeated prefix withdrawals. Those alternatives do not match the demonstrated counter pattern.

   Reference: ThousandEyes Metrics: What Do Your Results Mean? — Device Layer > Discards

4. 4A manually configured network alert must require both latency of at least 120 ms and loss of at least 3% at a qualifying agent. Which location-condition combination meets the requirement?

   1. A. Any: latency is at least 120 ms; packet loss is at least 3%.
   2. B. All: latency is at most 120 ms; packet loss is at most 3%.
   3. C. All: latency is at least 120 ms; packet loss is at least 3%.
   4. D. All: latency is at least 120 ms; packet loss is at most 3%.

   Answer: C

   Explanation: The documentation says, "Select All when all the specified location alert conditions must be met (AND)". Both stated minimums require All with ≥ comparisons. Any can trigger when just one metric qualifies; both ≤ comparisons reverse the ranges, and using ≤ for loss accepts the wrong loss range.

   Reference: Global and Location Alert Conditions — Setting Global Alert Conditions Manually > All/Any

5. 5A team must monitor a private web application from a customer-controlled Linux server behind its firewall. Which ThousandEyes deployment provides that native server vantage point?

   1. A. Select a Cloud Agent at the nearest available public monitoring location.
   2. B. Deploy an Endpoint Agent as a native Linux server monitoring service.
   3. C. Deploy an Endpoint browser plugin alone as the server's complete agent.
   4. D. Install an Enterprise Agent on the supported Linux server.

   Answer: D

   Explanation: The agent comparison says Enterprise Agents can be "installed directly on native Linux systems". The Endpoint installation guide directs users to supported Windows, macOS, Android, ChromeOS or Cisco-device paths, rather than native Linux-server installation. The exam guide states, "Real User Tests require two components:" including the core Endpoint Agent and browser extension, so an extension alone is not the complete agent. An Enterprise Agent supplies the required customer-controlled Linux vantage point.

   Reference: Global Vantage Points — Comparison of Agent Types > Enterprise Agents

6. 6A ThousandEyes container named teagent is already installed and activated through Cisco App Hosting, but it has not been started. Which command advances it to the running stage?

   1. A. app-hosting install appid teagent package usbflash1:teagent.tar
   2. B. app-hosting deactivate appid teagent
   3. C. app-hosting activate appid teagent
   4. D. app-hosting start appid teagent

   Answer: D

   Explanation: The guide gives the final deployment step as "Start: app-hosting start appid myapp". Installation and activation precede that step. For the already installed and activated container named teagent, run app-hosting start appid teagent. Install or activate does not perform this final transition, while deactivate moves away from running.

   Reference: Network Assurance Self-Study Prep Guide — Printed page 38, Enterprise Agent Configuration > Cisco App Hosting Command Lifecycle

7. 7Voice quality degrades while end-to-end loss stays near zero. Collected packet timings show much greater variation around their mean than before. Which network condition explains this timing evidence?

   1. A. Higher steady latency with little variation between packet timings.
   2. B. Higher packet loss with unchanged latency among received packets.
   3. C. Higher jitter reflecting greater variation in measured packet latency.
   4. D. Lower average latency with less variation between packet timings.

   Answer: C

   Explanation: The guide defines "Jitter: The mean deviation of latency." Greater deviation around the latency mean identifies higher jitter. A steady delay or reduced variation does not match this evidence, and rising packet loss is inconsistent with the near-zero loss observation.

   Reference: ThousandEyes Metrics: What Do Your Results Mean? — Network Layer > End-to-End Metrics > Jitter

8. 8A manual Network & App Synthetics rule must detect a persistent fault at one vantage point over consecutive rounds. A different agent breaching in each round must not satisfy persistence. Which trigger setting is required?

   1. A. Any of the agents across the required rounds.
   2. B. The same agent across the required rounds.
   3. C. A new qualifying agent in each required round.
   4. D. An aggregate of all breaches without agent identity.

   Answer: B

   Explanation: The documentation states, "Select the same if you want an alert activated only if the same set of alert triggers meet the alert conditions(s) in consecutive rounds." Sticky triggers preserve agent identity. Allowing arbitrary agents or aggregating unrelated breaches would not establish persistence at one vantage point.

   Reference: Global and Location Alert Conditions — Setting Global Alert Conditions Manually > any of/the same

9. 9An assurance design must capture an individual employee's Wi-Fi conditions and web-application experience from the employee's workstation. Which deployment supplies that vantage point?

   1. A. Install an Endpoint Agent on the employee's workstation.
   2. B. Install an Enterprise Agent on the branch's server host.
   3. C. Select a Cloud Agent in the employee's nearest city.
   4. D. Install an Enterprise Agent in the application datacenter.

   Answer: A

   Explanation: The documentation states, "Endpoint Agents are installed on a PC or Mac, and provide on-demand and real-time visibility into each employee’s experience of SaaS and internally-hosted apps, as well as underlying wireless LAN, WAN, Internet connectivity and system health." A server or external vantage point cannot substitute for the workstation-specific vantage point required here.

   Reference: Global Vantage Points — Comparison of Agent Types > Endpoint Agents

10. 10A firewall team is preparing connectivity between an Enterprise Agent and the ThousandEyes platform. Which direction must support initiation of the platform communication?

    1. A. From the Enterprise Agent toward the ThousandEyes platform.
    2. B. From the ThousandEyes platform toward an agent listening port.
    3. C. From the monitored application toward the ThousandEyes platform.
    4. D. From a Cloud Agent toward the Enterprise Agent management port.

    Answer: A

    Explanation: The guide states, "All communication with the ThousandEyes platform from the Enterprise Agent is initiated by the agent". Configure the required agent-originated connectivity. This statement concerns platform communication; test-specific network access must also be considered separately.

    Reference: Getting Started with Cloud and Enterprise Agents — Preparing the Network, platform communication