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| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Designing and Implementing Enterprise Network Assurance |
| Exam Number: | 300-445 |
| Exam Price: | $300 USD |
| Real Exam Qty: | 55-65 |
| Passing Score: | 750 (out of 1000) |
| Available Languages: | English |
| Related Certifications: | CCNP Enterprise Cisco Certified Specialist - Enterprise Network Assurance |
| Exam Format: | Multiple-choice, Multiple-answer, Drag-and-drop, Fill-in-the-blank |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Sample Questions: | Cisco 300-445 Sample Questions |
| Exam Way: | Pearson VUE (Online or Test Center) |
| Pre Condition: | None |
| Official Syllabus URL: | https://learningnetwork.cisco.com/s/300-445-exam-topics |
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NEW QUESTION # 47
A network engineer is investigating widespread reports of poor performance for a data center-hosted web application. Which ThousandEyes agent type would be most effective for quickly identifying the root cause?
Answer: A
Explanation:
According to theDesigning and Implementing Enterprise Network Assurance (300-445 ENNA)guidelines, troubleshooting widespread performance issues for a public or data center-hosted app17lication requires an
"outside-in" perspective. When reports are widespread,18the goal is to determine if the issue is global, regional, or specific to certain ISP paths leading to the data center.
TheCloud Agent(Option D) is the most effective tool for this task because these agents are maintained by Cisco ThousandEyes in over 240+ locations worldwide within Tier 1, 2, and 3 ISPs and cloud provider regions.19Because they arepre-deployed and immediately available, a network engineer can instantly run tests from multiple global locations toward the data center-hosted application without having to install any software or manage any infrastructure. This allows the engineer to quickly compare performance metrics (latency, loss, and page load times) across different geographies. If Cloud Agents in London report no issues while those in New York report high packet loss, the engineer can immediately pinpoint the root cause as a regional ISP or peering issue rather than a failure within the data center itself.
* Enterprise Agent (Option B):While these could be used if they were already installed in various branch offices, they require ownership of the infrastructure and deployment time. They are better suited for "inside-out" monitoring.
* Endpoint Agent (Option C):These are useful for troubleshooting individual user experience but are not the "quickest" way to baseline global performance against a data center application during a widespread event.
* Synthetic Agent (Option A):As noted previously, this is a generic term describing the underlying technology used by all ThousandEyes agent types.
Therefore,Cloud Agentsprovide the necessary breadth and immediate availability to perform rapid root cause analysis for widespread application performance issues.
NEW QUESTION # 48
A CPU utilization alert for Endpoint Agents is triggering too frequently, creating alert noise. Which of the following steps would help reduce the sensitivity of the alert rule? (Select two)
Answer: B,C
Explanation:
Alert fatigue is a major operational challenge in network assurance. To make a CPU utilization alert for Endpoint Agents less sensitive and reduce "noise," an engineer must implement statistical filters that ignore transient spikes or isolated events.
The two most effective methods are:
Increase the agent count (Option A): By requiring a higher number or percentage of agents to simultaneously exceed the threshold, the system ensures the alert represents a widespread environmental issue rather than a single user running a CPU-intensive background process.
Require more rounds of data (Option C): Instead of alerting on a single measurement (1 of 1 round), the engineer can configure the rule to require the threshold to be breached for multiple consecutive checks (e.g., 2 of 3 rounds). This filters out brief, non-impactful CPU spikes that occur naturally during OS updates or browser startups.
NEW QUESTION # 49
What is the primary benefit of integrating Cisco technologies in network management?
Answer: C
Explanation:
Integration of Cisco technologies centralizes management tasks, streamlining network operations and improving efficiency.
NEW QUESTION # 50
Carefully review the exhibits. Which detail indicates the network issue might be caused by a BGP Hijack?
Answer: D
Explanation:
In the Designing and Implementing Enterprise Network Assurance (300-445 ENNA) curriculum, identifying routing anomalies such as BGP Hijacking is a critical aspect of external network assurance. A BGP Hijack occurs when an Autonomous System (AS) illegitimately announces a prefix it does not own, causing traffic intended for the rightful owner to be misdirected.
By contrasting Exhibit 3.4-1 (Before the Outage) and Exhibit 3.4-2 (During the Outage), a definitive change in the routing path is observed. In the baseline view (Exhibit 3.4-1), traffic from the Los Angeles agent reaches the destination network 54.239.104.0/23, which is correctly associated with Amazon.com, Inc. (AS 16509). However, during the outage (Exhibit 3.4-2), the path visualization shows the traffic being redirected into a different network: eNET Inc. (AS
10297). At this new location, the traffic encounters 100% Forwarding Loss at the node ten7-
8.core-2.xlhost.com.
The change in the Autonomous System (AS) number from 16509 to 10297 (Option B) is the most concrete indicator of a BGP Hijack. While symptoms such as Availability Drop (Option A), Response Delay (Option C), and Packet Loss (Option D) are clearly visible in the ThousandEyes telemetry, these symptoms are generic and could be caused by various other issues like physical link failures or congestion. The shift in the AS path--specifically to an AS that does not legitimately host the target's IP prefix--provides the forensic evidence needed to identify the root cause as a routing takeover. This visualization allows network administrators to bypass internal troubleshooting and immediately focus on external remediation with upstream providers.
NEW QUESTION # 51
Which RFC defines the framework for active monitoring in network assurance?
Answer: A
Explanation:
RFC 7880 defines the framework for active monitoring, providing guidelines for conducting proactive tests and measurements in network assurance.
NEW QUESTION # 52
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