A technician is attempting to join a workstation to a domain but is receiving an error message stating the domain cannot be found. However, the technician is able to ping the server and access the internet. Given the following information:
✑ IP Address – 192.168.1.210
✑ Subnet Mask – 255.255.255.0
✑ Gateway – 192.168.1.1
✑ DNS1 – 8.8.8.8
✑ DNS2 – 1.1.1.1
✑ Server – 192.168.1.10
Which of the following should the technician do to fix the issue?
Correct Answer:
A
Comprehensive and Detailed Explanation From Exact Extract:
The issue described—??domain cannot be found?? despite the ability to ping the server and access the internet—indicates aDNS resolution problem, not a network connectivity issue. The workstation is currently usingpublic DNS servers (8.8.8.8 and 1.1.1.1)which cannot resolve internal domain names, such as the ones used in Active Directory environments. To resolve this, the technician needs tochange the DNS settings to point to the internal DNS server, which in most domain setups is thedomain controller itself (likely 192.168.1.10 in this case).
Here??s the breakdown of the incorrect options:
✑ B. Assign a static IP address: The IP is already assigned and functioning; the
device can ping and reach the network and internet.
✑ C. Configure a subnet mask: The subnet mask is appropriate for the network range (Class C /24).
✑ D. Update the default gateway: The gateway is valid and allows internet access; this is not the issue.
CompTIA A+ 220-1102 Core 2 Objective Reference:
Objective 1.8 – Given a scenario, use features and tools of the operating system. Under this objective, candidates must know how to troubleshoot OS-based network configurations, includingproper DNS settings in domain environments.
A company recently transitioned to a cloud-based productivity suite and wants to secure the environment from external threat actors. Which of the following is the most effective method?
Correct Answer:
A
Comprehensive and Detailed Explanation From Exact Extract:
Multifactor authentication (MFA) is considered one of the most effective security measures for cloud environments. It requires users to verify their identity using two or more factors (e.g., password + phone app code), making it significantly harder for external attackers to gain access, even if the primary password is compromised.
* B. Encryption is important for data protection but doesn??t prevent unauthorized logins.
* C. Backups protect against data loss but don??t stop breaches.
* D. Strong passwords are helpful but can still be phished or cracked — MFA adds a critical
extra layer. Reference:
CompTIA A+ 220-1102 Objective 2.2: Compare and contrast authentication technologies. Study Guide Section: Cloud security best practices — MFA and access control
SIMULATION
Multiple users are reporting audio issues as well as performance issues after downloading unauthorized software. You have been dispatched to identify and resolve any issues on the network using best practice procedures.
INSTRUCTIONS
Quarantine and configure the appropriate device(s) so that the users?? audio issues are resolved using best practice procedures.
Multiple devices may be selected for quarantine. Click on a host or server to configure services.
If at any time you would like to bring back the initial state of the simulation, please click the Reset All button.
Solution:
Host 2, Host 3, Host 4 , Host 5 ,Host 6, Host 7, Host 8 , Media Server - Stop All unwanted and malicious service (Persistance.j1zpxn Installer Service) from all the listed host and Media servers
Refer screenshot below on the required service started/stopped on host2, same service to be started and stopped across all host servers.
Does this meet the goal?
Correct Answer:
A
The screen of a previously working computer repeatedly displays an OS Not Found error message when the computer is started. Only a USB drive, a keyboard, and a mouse are plugged into the computer. Which of the following should a technician do first?
Correct Answer:
C
Comprehensive and Detailed Explanation From Exact Extract:
An "OS Not Found" error typically indicates that the computer is attempting to boot from a drive that doesn't contain a valid operating system or bootable partition. The presence of a USB drive might be confusing the boot order. Therefore, the first step a technician should take is to verify and adjust the boot sequence in the system??s firmware (BIOS or UEFI). It's possible that the USB drive is being prioritized over the internal hard drive, which may cause the system to miss the OS entirely.
* A. Running data recovery tools is premature before confirming boot order.
* B. Repartitioning the disk would destroy existing data—this should not be done until confirmed the OS is actually missing.
* D. Switching between UEFI and BIOS (legacy mode) might help in rare cases, but it is not the first step in standard OS boot issue troubleshooting.
Reference:
CompTIA A+ 220-1102 Objective 1.7: Troubleshoot common operating system problems. Study Guide Section: Boot process and boot order configuration.
===========================
A user recently installed an application that accesses a database from a local server. When launching the application, it does not populate any information. Which of the following command-line tools is the best to troubleshoot the issue?
Correct Answer:
D
Comprehensive and Detailed Explanation From Exact Extract:
The scenario involves an application that should retrieve data from a local database server but is failing to do so. This likely indicates a problem in communication between the application and the database server (such as a network issue, port misconfiguration, or service unavailability). The correct troubleshooting approach involves testing the network/service connectivity between the client and the database.
Let??s examine the options:
✑ A. ipconfig:This command displays IP configuration details for Windows systems, such as IP address, subnet mask, and default gateway. While useful for diagnosing general networkissues, it does not test service connectivity or the availability of a specific application port/service.
✑ B. nslookup:Used to query DNS servers to resolve domain names to IP addresses.
However, since the question references a local server (likely accessed via IP or static hostname), DNS is probably not involved. Also, it does not test application/service availability.
✑ C. netstat:Displays active TCP connections, listening ports, and routing tables. It
helps determine whether the local system is listening for or maintaining any network connections, but it does not initiate a connection to test availability. It??s diagnostic but not interactive for service testing.
✑ D. curl:This is the most appropriate tool for this scenario. curl is used to test
connectivity to services over protocols like HTTP, HTTPS, FTP, and more. If the application retrieves data via a web interface or API (common in database-driven applications), curl can be used to test if the application can successfully reach and retrieve data from the server. It provides immediate, testable feedback on whether the server and service are available and responsive.
Example usage: curlhttp://localhost:8080/api/data
This command would test whether a local server's application programming interface (API) is available and responding on port 8080.
CompTIA A+ 220-1102 Reference Points:
✑ Objective 2.4: Given a scenario, use appropriate tools to troubleshoot and support Windows OS issues.
✑ Objective 3.3: Use appropriate tools to troubleshoot and resolve issues.
✑ The CompTIA A+ Core 2 study guide references curl as a useful command-line utility for testing connectivity and troubleshooting application access to services.
===========================