CompTIA Updated 220-1102 Exam Questions and Answers by kacper

The nslookup command is a network administration tool used for querying the Domain Name System (DNS) to obtain domain name or IP address mapping or for any other specific DNS record. It's the most direct way to verify if a PC can resolve a website's domain name to its IP address.  

Here's why the other options are not the primary tools for this task:

B. hostname: This command displays the hostname of the computer.

C. tracert: This command traces the route packets take to reach a specific destination. It can help identify network connectivity issues but doesn't directly test DNS resolution.

D. netstat: This command displays active network connections and listening ports. It's not used for DNS troubleshooting.

How to use nslookup:

Open a command prompt.

Type nslookup (e.g., nslookup google.com) and press Enter.

The output will show the DNS server used and the IP address(es) associated with the website.

If the command returns an error or doesn't show an IP address, it indicates a problem with DNS resolution.

When troubleshooting a printer that was previously working but is no longer recognized by a workstation, Event Viewer is the most appropriate tool to check for historical logs and events related to the printer and the system.

Option A: Performance MonitorPerformance Monitor is used for monitoring system performance and resources in real-time and does not provide specific historical event logs related to device failures.

Option B: Devices and PrintersDevices and Printers show the status and properties of connected devices but do not provide a historical log of events or errors.

Option C: Task SchedulerTask Scheduler manages and monitors scheduled tasks but does not log hardware events or errors.

Option D: Event ViewerEvent Viewer logs system events, including errors, warnings, and information related to hardware and software. It is ideal for checking what happened prior to the printer failure.

References:

CompTIA A+ 220-1102 Objective 3.1 (Troubleshoot common Windows OS problems), particularly using Event Viewer for diagnosing issues​​.

The correct place to check proxy settings in Windows 10 is under Internet Options (Option B), specifically in the "Connections" tab. Proxy configurations can affect internet speeds if misconfigured or if a proxy is being used unnecessarily.

Network and Sharing Center (Option A) provides information on network connections but doesn't handle proxy settings.

Firewall settings (Option C) manage network traffic rules but don't directly affect proxy settings.

System settings (Option D) contain general system configurations, not specific to proxy settings.

CompTIA A+ Core 2 References:

1.6 - Configure networking features in Windows, including proxy settings

The first step in troubleshooting is to check for any installed patches and roll them back one at a time until the issue is resolved. This can help to identify any patches that may be causing the issue and allow them to be removed.