CNX-001 Premium Exam Questions

Comprehensive and Detailed Explanation From Exact Extract:

According to the structured troubleshooting methodology outlined in the CNX-001 objectives, once a potential root cause is identified (in this case, a suspected firmware bug), the next step is to test the theory to confirm the cause before taking action. This helps prevent misdiagnosis and unnecessary configuration changes.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Structured Troubleshooting Methodology”:

“After identifying symptoms and forming a theory of probable cause, the next step is to test the theory to verify it is the actual cause of the problem.”

Other options:

A. Establishing a plan of action comes after confirming the cause.

C. Documenting lessons learned is the final step.

D. Implementing the solution should only occur after the issue is confirmed.

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Comprehensive and Detailed Explanation From Exact Extract:

WAF (Web Application Firewall) protects web applications by inspecting HTTP/S traffic to and from the application. It filters, monitors, and blocks malicious traffic and exploits targeting web application vulnerabilities. WAFs are deployed at the edge, often in conjunction with load balancers, and are ideal for mitigating threats like SQL injection, cross-site scripting, and protocol violations.

NSG (Network Security Group) is a native security feature offered by many cloud providers (such as Azure), functioning similarly to a firewall. NSGs control inbound and outbound traffic at the virtual network interface, subnet, or VM level, allowing engineers to define allowed or denied traffic rules.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide under “Cloud Workload Protection & Security Tools”:

“WAFs are critical for protecting web-facing applications in public cloud environments.”

“Network Security Groups (NSGs) are used to enforce access policies on cloud-based virtual networks, providing filtering and segmentation at the instance or subnet level.”

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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:

The traceroute shows that the traffic successfully passes through the application development network (192.168.2.1), to the server segment gateway (192.168.1.1), and reaches the serversegment firewall (192.168.4.1). However, it times out immediately after hitting 192.168.4.1, indicating that the traffic is being dropped or filtered at that firewall.

Because other users (outside of the application development segment) are able to SSH into the database server (192.168.1.9), the issue is not with the database server itself or the core network. This points to the server segment firewall blocking traffic originating from the application development subnet (192.168.2.0/24), which is a common practice in segmented network designs unless proper access rules are defined.

Relevant Extract from CompTIA CloudNetX CNX-001 Study Guide — under “Network Segmentation and Firewall Rules”:

“Firewalls between network segments may enforce security policies that restrict access based on source/destination IP and port. Lack of proper allow rules can result in blocked traffic even if routing is successful.”

Other options:

A. The core firewall is not in the traceroute path; it is irrelevant to this specific flow.

B. NSGs (Network Security Groups) apply to cloud workloads, but the behavior and hop-by-hop flow suggest it is a firewall-level issue, not NSG misconfiguration.

D. Bandwidth issues would typically show packet loss or high latency, not consistent timeouts at a specific hop.