16 November 2017

Wifi: Channel

- wifi umpama hub. satu client hantar signal/gelombang, semua boleh nampak.
- 2 hantar serentak, akan ada gangguan/interference
- CCA(Clear Channel Assessment): semak dulu tiada client lain yg hantar signal, baru hantar. kalau ada, tunggu pada masa yg rawak, baru cuba hantar semula.
- receiver mesti ACK setiap terima signal.




ref:
1- https://commotionwireless.net/docs/cck/networking/learn-wireless-basics/ (good)
2- https://documentation.meraki.com/MR/WiFi_Basics_and_Best_Practices/Channel_Planning_Best_Practices
3- 

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