CompTIA CNX-001 - CompTIA CloudNetX Exam

Comprehensive and Detailed Explanation From Exact Extract:

Jitter refers to the variation in packet delay during transmission. In the ping output shown, the response times fluctuate significantly (11ms, 672ms, 849ms, 34ms), indicating inconsistent network performance. Such variation leads to a poor experience in real-time applications likevideo calls. High jitter causes packets to arrive out of order, resulting in stuttering or choppy audio/video.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Troubleshooting Real-Time Network Services”:

“Jitter is the deviation in packet arrival times and directly affects real-time communications such as VoIP and video conferencing. Consistent latency is tolerable; inconsistent latency (jitter) is disruptive.”

Other options:

A. Throughput refers to bandwidth and would cause consistent slowness.

C. Latency alone, if stable, is acceptable; it's the inconsistency here that causes issues.

D. Loss would be indicated by missing packets; the ping results show replies to all packets.

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Comprehensive and Detailed Explanation From Exact Extract:

Since payments are working and orders are being recorded in the cloud, the issue likely lies in the local wireless network between the tablets and the kitchen printers. If the issue only occurs during high usage periods, it’s likely a congestion or signal quality issue. Adding a dedicated access point for the kitchen can isolate printer traffic and improve reliability.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Wireless Performance and Interference Management”:

“Segmenting traffic or deploying dedicated APs for mission-critical devices can reduce contention and ensure reliability in congested wireless environments.”

Other options:

A. App updates won’t fix wireless interference.

C. Dongle upgrades may help but don’t isolate the traffic.

D. Static IPs help with addressing, not with wireless reliability.

Comprehensive and Detailed Explanation From Exact Extract:

A Content Delivery Network (CDN) distributes content across geographically distributed edge locations to provide faster access and higher quality to users, especially in areas with suboptimal connectivity to central data centers. By caching and serving content from edge servers near users, CDNs reduce latency and improve streaming performance globally.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “CDN and Cloud Edge Services”:

“CDNs provide globally distributed edge nodes for content caching and delivery, ensuring low-latency, high-bandwidth access for end users regardless of their location.”

Other options:

A. Reduces quality, contrary to the stated goal.

B. DNS-based routing helps with direction but does not solve content delivery or bandwidth issues.

C. Load balancers help distribute traffic locally, but do not provide edge caching or bandwidth optimization.

 

Comprehensive and Detailed Explanation From Exact Extract:

To better secure administrative interfaces, the best practice is to isolate them from the production network by connecting the management ports to a separate, dedicated management network. This prevents unauthorized access from devices or users on the production subnet and reduces the attack surface.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Securing Network Infrastructure”:

“Management interfaces should be placed on a separate out-of-band management network, providing physical and logical separation from user and data traffic.”

This ensures that only trusted devices on the management network can access the administrative interfaces.

Other options:

B. Disabling unused ports is good practice but does not address the segregation of management traffic.

C. Placing admin interfaces and production traffic on the same VLAN exposes them to potential internal threats.

D. Firmware upgrades are important for security patches but do not isolate the interface.

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Comprehensive and Detailed Explanation From Exact Extract:

When SSL/HTTPS inspection is enabled on a firewall, it intercepts and decrypts HTTPS traffic. This requires the firewall to present its own trusted certificate to the client device. If that certificate is expired, the client browser will display a certificate error and block access to the application. This is a common misconfiguration that breaks HTTPS communication.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “TLS/SSL Inspection and Certificate Management”:

“SSL inspection appliances must have valid certificates installed. Expired or untrusted certificates will result in browsers rejecting the HTTPS session and displaying errors to users.”

Other options:

A. Would prevent connection, but not result in certificate errors.

B. Blocked port 443 would prevent any connection, not cause cert errors.

C. Client-side certificates are not required unless mutual TLS is configured, which is not stated here.

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