How can I check if my computer has a valid IP address and subnet mask?

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Grade: Education Subject: Support
How can I check if my computer has a valid IP address and subnet mask?
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Open Command Prompt and type 'ipconfig /all'. Look for 'IPv4 Address' and 'Subnet Mask'. Ensure both computers have valid IP addresses within the same subnet. If they don't, you may need to configure static IP addresses or renew DHCP leases.