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Computer networks.md

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Computer networks

  • "NAT" stands for "Network Address Translation".
  • On a typical network, you have an IP address like 192.168.0.20, which is a private IP, not your public Internet IP address.
  • A NAT router performs intelligent address translations between private and public IP addresses.
  • IPv4 and its small address space was the reason NAT had to be invented.

Wi-Fi

Encoding SSID and password as a QR code

Encode the following text as a QR code, replacing <SSID> and <PASSWORD> with the actual values for your network:

WIFI:S:<SSID>;T:WPA;P:<PASSWORD>;;

For example, that text could be (before encoding):

WIFI:S:My-SSID;T:WPA;P:my-password;;

Alternatively, use a tool like QiFi (source code) online.