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| Section | Objectives |
|---|---|
| Troubleshooting and Analysis | - Performance and fault analysis
|
| Monitoring and Telemetry Technologies | - Data collection mechanisms
|
| Assurance Platforms and Tools | - Cisco assurance platforms
|
| Enterprise Network Assurance Architecture | - Assurance concepts and methodologies
|
| Automation and Data Interpretation | - Data-driven assurance workflows
|
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NEW QUESTION # 52
Why is it essential to validate alert configuration and functionality in network assurance?
Answer: C
Explanation:
Validating alert configuration and functionality is essential to minimize false positives and ensure accurate alerting for efficient incident response in network assurance.
NEW QUESTION # 53
Refer to the exhibit.
An engineer must use Cisco ThousandEyes testing to monitor their Cisco Catalyst SD-WAN fabric. Which SD-WAN component is being monitored by ThousandEyes?
Answer: D
Explanation:
In the Designing and Implementing Enterprise Network Assurance (300-445 ENNA) curriculum, understanding the visibility gap between the SD-WAN overlay and the transport underlay is a core competency. The provided exhibit illustrates a ThousandEyes Enterprise Agent deployed on a Branch Edge Router performing tests across two distinct paths: Internet (reaching a destination at 64.100.249.90) and MPLS (reaching a destination at 172.29.0.2).
According to the ENNA architecture guidelines, ThousandEyes is primarily utilized to provide hop-by-hop visibility into the underlay network. While SD-WAN controllers like vManage provide native monitoring for the overlay-the logical IPsec tunnels (Option B) that form the SD-WAN fabric-they often lack granular visibility into the physical service provider paths (the underlay) that carry those tunnels. The exhibit specifically highlights the agent probing the transport networks (Transport VPN0) directly, bypassing the overlay tunnels to measure the raw performance of the ISP and MPLS circuits.
By monitoring the underlay (Option A), the engineer can identify if high latency or packet loss is caused by a specific hop within the service provider ' s infrastructure or at a peering point. This " underlay visibility " is critical for troubleshooting SD-WAN performance issues where the overlay may report a tunnel down, but the root cause lies in a BGP routing change or physical fiber cut in the provider network. ThousandEyes Enterprise Agents, natively integrated into Catalyst 8000 and ISR 4000 platforms, allow for this persistent underlay monitoring without additional hardware.
* Overlay (Option C): While ThousandEyes can monitor overlay performance, the exhibit ' s focus on the raw IP addresses (Internet and MPLS) in the transport VPN indicates an underlay test.
* IPsec/GRE Tunnels (Options B & D): These represent the transport mechanisms of the overlay.
ThousandEyes probes the path under these tunnels to ensure the transport health is sufficient to support the fabric.
NEW QUESTION # 54
What is a limitation of synthetic web tests in network assurance?
Answer: D
Explanation:
A limitation of synthetic web tests is their inability to detect client-side issues, potentially leading to incomplete performance evaluation in network assurance.
NEW QUESTION # 55
An engineer deployed a Cisco ThousandEyes Enterprise Agent on a Meraki MX to monitor a critical SaaS application. Which kind of monitoring has the engineer set up?
Answer: C
NEW QUESTION # 56
An engineer needs to create a test that requires authentication configuration to monitor an API. The test must send a POST request with client credentials parameters to get a token. The token then needs to be sent out on a GET request to be authorized to get the resource.
What must be done to meet the requirements? (Choose two)
Answer: A,D
Explanation:
In theDesigning and Implementing Enterprise Network Assurance (300-445 ENNA)curriculum, monitoring modern APIs often requires handling complex authentication flows, such as OAuth 2.0 with specific client credential parameters. The provided exhibit illustrates theHTTP Authenticationoptions available within a standard HTTP Server test: None, Basic, NTLM, Kerberos, and OAuth.
According to the ENNA implementation standards, while the HTTP Server test type supportsOAuth(Option C), its native implementation is limited. Specifically, it is designed to use a pre-existing token or a simple token refresh flow; it does not support the injection of custom parameters in the initial POST request required to obtain a token in many enterprise client-credential scenarios. Basic and NTLM (Options A and B) are legacy protocols that rely on simple username/password headers and cannot facilitate the multi-step token exchange process described.
To fulfill the requirement of a two-step flow (POST for token, followed by GET for resource), engineers must use more flexible test types:
* Transaction scripts (Option D):These allow the engineer to write custom JavaScript using the ThousandEyes transaction library to programmatically handle the POST request, parse the resulting JSON token, and then pass that token into the subsequent GET request's header.
* API tests (Option E):These are purpose-built for API monitoring and natively support the definition of variables and multi-step requests where the output of one call (the token) serves as the input for the next.
By utilizing these advanced test types, the engineer can successfully navigate complex authentication requirements that the standard HTTP Server test cannot accommodate.
NEW QUESTION # 57
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