BSOD- You have a windows server that restart every now and then. Before it restart it displays a Blue screen, how do you investigate the problem? What tools do you use? What's the use of pagefile? What is RDP port number? How to troubleshoot a machine that is has connection fail error remotely? Responds to ping but doesn't connect? doesn't respond to ping ? How do you Remotely check what is blocking traffic on a pc? What tool do you used? command to check running services and port on local and remote server ? How to check which port is used by a service on a windows machine? Explain DNS operation DNS port number and protocols, how are they used? which is default protocol? Name 3 DNS records, what is the most common record? What's the use of CNAME record? SRV record? DHCP IP address assignment process How to have a client used the same IP address without inserting it manually? You have a machine with 169.254.x.x IP address, why is this client not reachable? What is the difference between public and private IP? Web browsing. what common errors do you receive when Web connection fails What code you receive when connection succeeds? When it fails? Active directory what is FSMO, what are their use? How to transfer them from one server to another? You clone Existing server then promote as domain received trust relationship failed, what happened? What happened when there is a time difference between a computer and a domain? between two domain controllers? Does the time difference on a client affect connection to a domain controller? What amount of time difference is it allowed? What is SysVol? What happened when it is deleted from a Domain controller? How do you recover sysvol when it is deleted from a domain controller? Difference between TCP and UDP Explain TCP connection process What is the most difficult problem you ever faced? how did you solve it? PS: Every time you answer a question on the way that interests them, they ask another question based on your answer.