Correct Answer. B. Assign private IP addresses to all devices and use NAT for internet access Using private IP addresses for internal devices and NAT (Network Address Translation) for internet access is a standard practice. This configuration enhances security and conserves public IP addresses.
Option A is incorrect. Using public IP addresses for all devices is not secure or economical as it exposes devices directly to the internet.
Option C is incorrect. Using only IPv6 does not address the need for private addressing within the internal network.
Option D is incorrect. Without a DHCP server, managing IP addresses, especially in larger networks, would be inefficient and prone to errors.

Correct Answer. B. Processes The Processes tab in Task Manager provides a detailed list of running applications and background processes, along with their CPU, memory, disk, and network usage. This tab is ideal for identifying which applications are consuming significant system resources, which can help diagnose issues with slow performance.
Option A is incorrect because the Performance tab shows overall system resource usage statistics and not individual process information.
Option C is incorrect because the Services tab manages background services and does not display real- time resource consumption by each service.
Option D is incorrect because the Startup tab only shows programs that run at startup and their impact on boot time, not current resource usage.

Payment card data and other sensitive personal information must be protected according to security policies and compliance requirements (e.g., PCI DSS). Storing the data in approved encrypted storage ensures it remains secure and accessible only by authorized personnel.

Correct Answer. B. ipconfig /all The ipconfig /all command is the most comprehensive option for viewing network configuration details, including whether an IP address is obtained from a DHCP server. It shows each network adapter's DHCP status, making it ideal for verifying DHCP-based IP address allocation.
Option A is incorrect because running ipconfig without any options only displays basic IP address information, not DHCP-specific details.
Option C is incorrect because ipconfig /displaydns shows the contents of the DNS resolver cache and does not provide information about DHCP.
Option D is incorrect because ipconfig /showclassid displays the DHCP class ID for all adapters, which does not directly confirm DHCP IP allocation.

Correct Answer. A. Ensure the laptop's network adapter is enabled and supports Ethernet For a laptop that connects over Wi-Fi but not Ethernet, the first step is to verify that the Ethernet adapter is enabled and functional, as this is a common oversight.
Option B is incorrect. The WLAN router wouldn't interfere with an Ethernet connection.
Option C is incorrect. While important, an OS update is unlikely to affect only the Ethernet connectivity.
Option D is incorrect. Network credentials affecting WLAN would not impact Ethernet connectivity unless configured to do so, which is less common.