Can you Solve this IT Helpdesk ticket?

@jonathon_eades

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13 videos

Why it worked

The content provides a practical, real-world IT troubleshooting scenario that resonates with individuals in the IT field, offering a clear problem, a logical diagnostic process, and a concise solution, all presented in an engaging slideshow format.

Summary

This slideshow presents an IT helpdesk ticket where a new PC cannot join the company domain despite having internet access. It details troubleshooting steps, revealing the PC is using an incorrect public DNS server instead of the internal one, which is crucial for domain resolution. The solution is to correct the DNS settings to the internal server.

Structure

1Introduction of an IT helpdesk ticket problem
2Troubleshooting steps showing the PC can ping the domain controller by IP but not resolve the domain name
3

Original caption

The PC has internet. It can ping the domain controller by IP. But when you try to join the domain… “Domain Controller could not be contacted.” The clue? DNS. This PC is using 8.8.8.8 instead of the company’s internal DNS server. Active Directory relies heavily on DNS to locate domain controllers and other services. If the client can reach the server by IP but can’t resolve the domain name, DNS should be high on your troubleshooting list. Internet working ≠ DNS configured correctly. Learning IT or studying for CompTIA? I’m building ExamWizardz.app around scenarios that make you actually troubleshoot instead of just memorize answers. #IT #HelpDesk #techtok #Networking #CompTIA

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On-screen text

Can you Solve this IT Helpdesk ticket? -> IT SUPPORT HELP DESK TICKET SUPPORT LEARN SOLVE TICKET #10433 Created: Sep 10, 2026 9:27 AM Subject New PC Won't Join Domain User IT Staff Device Windows 11 Pro Desktop User Report "I'm setting up a new Windows PC, but it keeps failing when I try to join the company domain." Domain corp.local Additional Info Internet access works normally. Error Message "An Active Directory Domain Controller for the domain could not be contacted." Computer Name/Domain Changes X An Active Directory Domain Controller for the domain could not be contacted. Ensure that the domain name is typed correctly, that you are connected to the network, and then try again. OK QUESTION What would you check first? ExamWizardz.app IT CERTIFICATION MADE SIMPLE. REAL SCENARIOS. REAL SKILLS. IT SUPPORT TROUBLESHOOTING TICKET #10433 INVESTIGATION 2/3 What You Find You run some basic troubleshooting and gather more information. C:\Windows\system32\cmd.exe IP Configuration Host Name IP Address. Subnet Mask Default Gateway DNS Servers C:\Windows\system32\cmd.exe Pinging 192.168.10.10 with 32 bytes of data: Reply from 192.168.10.10: bytes=32 time<1ms TTL=128 Reply from 192.168.10.10: bytes=32 time<1ms TTL=128 Reply from 192.168.10.10: bytes=32 time<1ms TTL=128 Reply from 192.168.10.10: bytes=32 time<1ms TTL=128 Ping statistics for 192.168.10.10: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), C:\Windows\system32\cmd.exe nlookup corp.local Server: dns.google Address: 8.8.8.8 *** DNS can't find corp.local: Non-existent domain ! DNS is set to a public server The PC is using 8.8.8.8 instead of the company's internal DNS server. Can reach the domain controller by IP The server responds to ping, so network connectivity is fine. Cannot resolve the domain name The client can't find corp.local using DNS, which is required to join the domain. QUESTION The PC can reach the server by IP, but can't find the domain. What's wrong? ExamWizardz.app IT CERTIFICATION MADE SIMPLE. Practice Real Scenarios Mock Exams Detailed Explanations SAME PROBLEMS. HIGHER SKILLS. help you save time and reduce material waste T556A T556B ANSWER -> IT SUPPORT TICKET #10433 INVESTIGATION ANSWER The PC is using the wrong DNS server. Active Directory relies heavily on DNS to locate domain controllers and services. Current DNS (Incorrect) Internet Protocol Version 4 (TCP/IPv4) Properties Obtain DNS server address automatically Use the following DNS server addresses: Preferred DNS server: Alternate DNS server: 8.8.8 8.8.8 8.8.8 (Google DNS) What to Do 1 Change the DNS server to your organization's internal DNS server. 2 Make sure the domain controller is reachable by name. 3 Retry the domain join. Key Takeaway Internet working ≠ DNS configured correctly. If you can reach a domain controller by IP but not by name, DNS should be one of the first things you check. LEARN TO TROUBLESHOOT, Not Just Memorize. More IT scenarios -> ExamWizardz.app ExamWizardz.app IT CERTIFICATION MADE SIMPLE. Practice Real Scenarios Mock Exams Detailed Explanations SAME PROBLEMS. HIGHER SKILLS.