Troubleshooting AD, DHCP, DNS, RDP Free Training Course for IT 

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Here are the steps on how to troubleshoot DHCP and DNS:
DHCP Troubleshooting
Check if DHCP server is running. You can do this by checking the DHCP server logs or by using a network monitoring tool.
Check if DHCP scope is configured correctly. The DHCP scope is the range of IP addresses that the DHCP server can hand out to clients. You can check the DHCP scope in the DHCP server configuration.
Check if DHCP lease information is available. The DHCP lease information is the list of IP addresses that have been handed out to clients by the DHCP server. You can check the DHCP lease information in the DHCP server logs.
Check if DHCP client settings are correct. The DHCP client settings are the settings on the client computer that tell it how to obtain an IP address from the DHCP server. You can check the DHCP client settings in the network properties of the client computer.
DNS Troubleshooting
Check if DNS server settings are correct. The DNS server settings are the IP addresses of the DNS servers that the client computer will use to resolve domain names. You can check the DNS server settings in the network properties of the client computer.
Check if DNS server is reachable. You can do this by pinging the DNS server from the client computer.
Check if DNS cache is working correctly. The DNS cache is a temporary storage area for DNS records. You can check the DNS cache on the client computer by opening a command prompt and typing ipconfig /flushdns.
Check if DNS server logs are available. The DNS server logs can provide valuable information about DNS issues. You can find the DNS server logs in the %SystemRoot%\System32\dns\dns.log file.
If you are still having problems with DHCP or DNS, you may need to contact your ISP or network administrator for further assistance.