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NEW QUESTION # 85
A network engineer wants to measure their SD-WAN performance metrics. Which agent deployment method is most suitable for this scenario?
Answer: B
Explanation:
In the context of Designing and Implementing Enterprise Network Assurance (300-445 ENNA), understanding the visibility gap in SD-WAN environments is essential. While SD-WAN controllers provide native visibility into the overlay network (the logical IPsec tunnels and fabric health), they often lack granular insight into the physical transport or underlay network provided by ISPs or MPLS circuits.
According to the ENNA architecture guidelines, the most suitable method for measuring true SD- WAN performance is to install an agent on the underlay network (Option D). By deploying ThousandEyes Enterprise Agents directly on the transport-facing interfaces (Transport VPN0 in Cisco SD-WAN terminology), engineers can perform hop-by-hop path visualization and measure metrics like packet loss, latency, and jitter across the actual provider path. This is critical because performance degradation in the overlay is almost always a symptom of an issue in the underlay, such as BGP routing instabilities or physical link congestion at an ISP peering point.
NEW QUESTION # 86
An
engineer receives a user report of slowness of an internal website at http://test-ipv6.com. Drag and drop the HTTP Server test phases from the left onto the steps on the right to troubleshoot the issue from the Cisco ThousandEyes test view. Not all options are used.
Answer:
Explanation:
NEW QUESTION # 87
Which type of test are we using for these dashboards (Executive and IT Operations)?
Answer: B
Explanation:
According to theDesigning and Implementing Enterprise Network Assurance (300-445 ENNA)data analysis guidelines, identifying the underlying test type is the first step in interpreting a dashboard. By observing the metrics displayed across both the Executive and IT Operations dashboards, we can definitively identify the test type asPage Load(Option B).
A Page Load test is a Web-layer test that uses a browser engine (Chromium) to fully render a page and collect advanced metrics beyond simple availability. Evidence for this test type in the dashboards includes:
* Page Completion Time:Displayed on the Executive dashboard map, this metric is specific to how much of the page successfully rendered.
* DOM Load Time:Found in the IT Operations dashboard, the Document Object Model (DOM) time is a browser-centric metric that measures when the page structure has finished loading.
* Waterfall Charts:While not a specific answer option, these are the foundation of Page Load tests, allowing for the timing of individual web components.
SimpleHTTP Servertests (Option A) only measure availability and response codes, missing the rendering metrics seen here.Agent to server(Option C) is a network-layer test that provides path visualization but no browser-level data.FTP(Option D) is a protocol-specific test not used for web application monitoring.
Therefore, the presence of DOM and Page Completion metrics confirms thePage Loadtest type.
NEW QUESTION # 88
Refer to the exhibit.
A network admin has been tasked with monitoring the IPv6 record and name server resolution times with different agents. Select the two actions that the engineer must take to meet the requirements.
Answer: B,D
Explanation:
According to the Designing and Implementing Enterprise Network Assurance (300-445 ENNA) curriculum, DNS testing is a fundamental component of ensuring application availability and performance.
The ThousandEyes platform provides two primary types of DNS tests: DNS Server and DNS Trace .
To satisfy the specific requirements of monitoring IPv6 records and name server resolution times , the engineer must utilize the DNS Server test . This test type is designed to measure the performance of specific DNS servers by querying them for particular resource records.
* Monitoring IPv6 Records: In the DNS system, IPv6 address records are known as AAAA records .
Therefore, to monitor the availability and resolution of IPv6 addresses for a domain, the engineer must create a DNS Server test and set the query type to AAAA (Option B).
* Monitoring Name Server Resolution Times: To measure how long it takes for a DNS server to return the authoritative name servers for a domain, the engineer must query for NS (Name Server) records .
By creating a DNS Server test targeting the NS record (Option D), the platform can provide granular metrics on the response time and availability of those specific records from the perspective of the selected agents.
DNS Trace tests (Options C and E) are less suitable for measuring specific resolution times of a single server; instead, they are used to visualize the entire delegation path from the root servers down to the authoritative servers to identify where a " break " in the chain occurs. Furthermore, an A record query (Option A) only provides the IPv4 address, failing the requirement to monitor IPv6. By selecting DNS Server tests for AAAA and NS records, the administrator ensures they have the precise performance data needed to baseline and troubleshoot the organization ' s DNS health.
NEW QUESTION # 89
What aspects should be validated when validating alert configuration and functionality in network assurance?
Answer: A,C,F
Explanation:
When validating alert configuration and functionality in network assurance, aspects such as alert triggering conditions, notification channels, and false positive rates should be validated to ensure accurate and efficient alerting.
NEW QUESTION # 90
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