Embedded systems, defined in A3.4, are small computers built into products, from smartphones to industrial machinery. They are usually resource-constrained, with only limited processing power, memory and energy. That makes efficient communication protocols essential: a device cannot afford to waste power or memory sending data inefficiently.
Communication matters for three reasons:
Wi-Fi
A wireless communication technology that uses radio waves to provide high-speed internet and network connectivity without physical cables.
Wi-Fi carries data quickly over a medium range, typically 20 to 50 metres indoors, at speeds reaching around 1 Gbps with newer standards. It is fast, widely supported and secure, ideal for streaming, file transfer and smart home devices. The trade-off is power: Wi-Fi draws a lot of it and can interfere with other devices, so it suits products that are mains-powered or often recharged rather than tiny battery devices.
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(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.
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