No network connectivity?
– Check link light, patch cable, disabled NIC, wireless switch off (on laptops), IP configuration, and Windows Network Diagnostics.

Limited connectivity?
– Ping localhost; then move outward and use ipconfig/all.

Poor wireless signal?
– Check distance, placement, antennas, and update hardware and software.

APIPA?
– IPconfig/release and /renew. Check DHCP server.

**Source by wikipedia**

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