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VCESoft Cisco的300-445考試培訓資料是每個參加IT認證的考生們的必需品，有了這個培訓資料，他們就可以做足了充分的考前準備，也就有了足足的把握來贏得考試。VCESoft Cisco的300-445考試培訓資料針對性很強，不是每個互聯網上的培訓資料都是這樣高品質高品質的，僅此一家，只有VCESoft能夠這麼完美的展現。
| Section | Objectives |
|---|---|
| Topic 1: Enterprise Network Assurance Architecture | - Assurance concepts and methodologies
|
| Topic 2: Assurance Platforms and Tools | - Cisco assurance platforms
|
| Topic 3: Troubleshooting and Analysis | - Performance and fault analysis
|
| Topic 4: Automation and Data Interpretation | - Data-driven assurance workflows
|
| Topic 5: Monitoring and Telemetry Technologies | - Data collection mechanisms
|
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問題 #63
To monitor communication and measure network performance from branch offices in San Francisco and Texas to the data center in North Virginia, which combination of test type and target is the most appropriate?
答案：B
解題說明：
According to theDesigning and Implementing Enterprise Network Assurance (300-445 ENNA) architecture, monitoring site-to-site connectivity between managed locations requires vantage points at both ends of the connection. In this scenario, the organization needs to measure performance between branch offices (San Francisco and Texas) and a central data center (North Virginia).
The most appropriate combination is usingEnterprise Agentswith theAgent-to-agent test type(Option C).
Enterprise Agents are software probes deployed on infrastructure owned or controlled by the organization, such as switches or routers in the branch offices and servers in the data center. Unlike Agent-to-server tests, which only provide one-way metrics and approximate path data, anAgent-to-agent testprovides bi-directional network metrics. This includes detailed throughput, packet loss, latency, and jitter measurements in both directions, which is critical for identifying asymmetric routing or link saturation that might affect application performance.
Alternative options are less suitable for this specific internal monitoring requirement:
* Cloud Agents (Options A and B):These are located in global ISP data centers and cannot be placed inside the organization's private data center or branch LAN to measure internal path characteristics.
* HTTP/DNS Server tests (Options B, D, and E):These target specific services but do not provide the granular, bi-directional network-layer performance data (like throughput or path visualization) that an Agent-to-agent test delivers.
* Agent-to-server (Option E):While useful for reaching a target that cannot host an agent, it loses the benefit of the destination agent's ability to measure the "return" path independently.
By deploying Enterprise Agents at each site and configuring Agent-to-agent tests, the engineer gains the highest level of visibility into the health of the private WAN or SD-WAN fabric connecting the branches to the data center.
問題 #64
Your organization wants to be notified of an event as soon as it is triggered by an alert threshold.
This notification should be sent to your ITSM and generate an incident so it can be responded to appropriately. What kind of integration should you use?
答案：A
解題說明：
In the Designing and Implementing Enterprise Network Assurance (300-445 ENNA) curriculum, the objective of modern network assurance is to bridge the gap between "visibility" and "action".
When an organization requires an automated workflow to handle network performance anomalies, the most efficient architecture is the native ServiceNow Integration (Option A). This integration is categorized as a "Custom-Built" or native integration within the ThousandEyes platform, designed specifically to facilitate the delivery of direct notifications into a ServiceNow account.
According to the ENNA implementation standards, the ThousandEyes ServiceNow integration utilizes the ServiceNow Incident Management module. When a predefined alert rule (such as a
5% packet loss threshold on a critical SaaS path) is violated, ThousandEyes triggers an event and immediately pushes the alert data to ServiceNow via an OAuth-authenticated connection.
Within ServiceNow, this data is used to automatically generate an Incident, complete with relevant metadata such as the test name, agent location, and the specific metrics that triggered the violation. This automation eliminates the manual overhead of "copy-pasting" alert details from a monitoring dashboard into a ticketing system, thereby significantly reducing the Mean Time to Identification (MTTI).
問題 #65 
Refer to the exhibit. An engineer received an alert about a security issue. Which two problems would cause the alert? (Choose two.)
答案：A,E
問題 #66
Exhibit:
An engineer works to optimize a website by reducing the page-load time to below 500 ms. The engineer set up a Cisco ThousandEyes page-load test to baseline the current website performance. Which action should be recommended to reduce page-load time?
答案：D
解題說明：
In the context ofDesigning and Implementing Enterprise Network Assurance (300-445 ENNA), analyzing page-load metrics within Cisco ThousandEyes requires identifying the primary bottlenecks that contribute to theTotal Page Load Time. The provided screenshot displays a "Page Breakdown" of 7 resources totaling 953 kB. A critical observation of the pie chart reveals thatImages(the teal-colored segment) constitute the vast majority of the page's payload and resource count.
When the goal is to reduce the page-load time from1023 msto below500 ms, the engineer must target the heaviest components.Lazy loadingis a design pattern that defers the initialization of non-critical resources at page load time. Instead of loading all images simultaneously when the userfirst navigates to the URL, lazy loading ensures that images are only downloaded as they are about to enter the viewport. This significantly reduces the initial DOM load time and the total Page Load Time because the browser does not have to wait for large image files to be fully retrieved before declaring the page "loaded." Alternative options are less effective in this specific scenario based on the data:
* AJAX (XHR/Fetch):The chart shows that XHR and Fetch resources represent a negligible sliver of the total weight; optimizing them would yield minimal gains.
* Moving IMG elements:While moving scripts to the bottom can help with rendering, moving image elements to the bottom of the body does not stop the browser from initiating the download requests immediately, thus failing to significantly reduce the total load time.
* CDN for Fonts:The "Font" category is also a small fraction of the total 953 kB. While a CDN is a best practice for latency, it does not address the primary "weight" issue caused by the images.
Therefore, implementinglazy loading(Option C) is the most impactful recommendation. It directly addresses the largest resource consumer (Images) identified in the ThousandEyes Page Breakdown, allowing the engineer to reach the sub-500 ms performance target.
問題 #67
A network monitoring engineer is tasked with creating a widget that displays the average packet loss from an agent installed as a Linux package. What is the data source and measure that should be selected?
答案：B
解題說明：
In Designing and Implementing Enterprise Network Assurance (300-445 ENNA), dashboard widgets must be mapped to the correct telemetry data source and statistical measure. When an agent is installed as a Linux package on an organization's infrastructure, it is classified as an Enterprise Agent.
The correct configuration for this widget is Cloud & Enterprise Agents and Mean (Option B).
Data Source: Since the Linux-based agent is an Enterprise Agent, it shares the same data source category as Cloud Agents in the ThousandEyes dashboard configuration menu.
Measure: To display the "average" packet loss as requested, the Mean (the arithmetic average) is the appropriate statistical measure.
問題 #68
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