Passed Exam Today CAS-005

The table indicates varying load times for users accessing the website from different geographic locations. Customers from Australia and India are experiencingsignificantly higher load times compared to those from the United States. This suggests that latency and geographical distance are affecting the website's performance.

A. IDS (Intrusion Detection System): While an IDS is useful for detecting malicious activities, it does not address performance issues related to latency and geographical distribution of content.

B. CDN (Content Delivery Network): A CDN stores copies of the website's content in multiple geographic locations. By serving content from the nearest server to the user, a CDN can significantly reduce load times and improve user experience globally.

C. WAF (Web Application Firewall): A WAF protects web applications by filtering and monitoring HTTP traffic but does not improve performance related to geographical latency.

D. NAC (Network Access Control): NAC solutions control access to network resources but are not designed to address web performance issues.

Implementing a CDN is the best solution to resolve the performance issues observed in the log output.

The routing entry 0.0.0.0/0 forces all traffic from remote clients—including traffic destined for the public internet—through the VPN tunnel. This is called full-tunnel VPN routing. While it ensures strong security by forcing all traffic to pass through corporate controls, it can also overload VPN gateways and cause slow access to both internal and external applications, as seen in this scenario.

The correct fix is to enable split tunneling (B). Split tunneling allows only corporate traffic (e.g., private IP ranges or internal applications) to flow through the VPN, while internet-bound traffic routes directly to the internet. This reduces congestion on VPN concentrators, improves performance for remote users, and ensures efficient use of bandwidth.

Moving servers to a screened subnet (A) relates to internal segmentation but does not fix the VPN bottleneck. NAC (C) enforces device compliance but does not address routing inefficiencies. DNS over HTTPS (D) secures name resolution but is unrelated to network congestion.

Thus, enabling split tunneling balances security and performance for remote workers.

A. Implementing allow lists: Allow lists (whitelisting) restrict network communication to only authorized devices and applications, significantly reducing the attack surface by ensuring that only pre-approved traffic is permitted.

F. Implementing a site-to-site IPSec VPN: A site-to-site VPN provides a secure, encrypted tunnel for data transmission between the OT systems and the vendor, protecting the data from interception and tampering during transit.

Other options:

B. Monitoring network behavior: While useful for detecting anomalies, it does not proactively reduce the risk of compromise or sabotage.

C. Encrypting data at rest: Important for protecting data stored on devices, but does not address network communication risks.

D. Performing boot integrity checks: Ensures the integrity of the system at startup but does not protect ongoing network communications.

E. Executing daily health checks: Useful for maintaining system health but does not directly reduce the risk of network-based compromise or sabotage.

To reduce the number of failed patch deployments, the systems administrator should implement a robust change management process. Change management ensures that all modifications to systems or applications are planned, tested, and approved before deployment. This systematic approach reduces the risk of unplanned changes that can cause patch failures and ensures that patches are deployed in a controlled and predictable manner.