2.4GHz Vs 5GHz WiFi | WiFi Dual Band | Which One Do You Need?
Here is a dual band wifi technology related bangla tutorial from DeyLance.

Wifi dual band is a combination of 2.4ghz vs 5ghz frequency. You can get this dual band wifi access if you have dual band router and a dual band supported android mobile.

A dual-band router is one that broadcasts both a 2.4 GHz and 5 GHz signal from the same unit, essentially providing you with two Wi-Fi networks and the best of both worlds.

A dual-band N router supports both bands for 11n, as well as previous 802.11 standards (a, b and g). Such routers can provide load balancing; for example, data might be configured to transmit on the 2.4 GHz band (SSID #1), while video uses the 5 GHz band (SSID #2).

2.4GHz offers coverage for farther distances, but may perform at slower speeds. Range : how far your data can travel. In most cases, the higher the frequency of a wireless signal, the shorter its range. ... Therefore, the 5GHz with its higher bandwidth will provide much faster data connections than 2.4 GHz.

Simultaneous Dual Band supports two separate WiFi networks simultaneously using both 2.4- and 5-GHz frequency bands. It not only doubles the available bandwidth but also allows for a more reliable dedicated WiFi network for video and gaming (5GHz) to be created.

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