質問: what is the difference between 2.4g and 5.8g?
回答: a waveband is. however, wireless knowledge is transmitted between devices. these bands are radio waves that transfer the data, and that they are often either 2.4 gc or 5.8 ghz. the 5.8g distinction between 2.4 and 5.8ghz bands is that they vary (coverage) and, therefore, the information measure (speed) they provide. for instance, the 2.4ghz band offers coverage at an extended range; however, it transmits data at slower speeds. instead, the 5.8ghz band provides less coverage however sends data at quicker speeds. 2.4ghz- pros and cons pros – coverage: 2.4ghz offers coverage at a longer range. it covers a larger area and provides a more extended range. – interference: 2.4ghz is more convenient if you have many walls or other objects where you need coverage. the waves used by this frequency are better suited for longer ranges and transmission through obstacles. – cost: 2.4ghz access points are cheaper than the ones supporting 5ghz. cons – speed: 2.4ghz transmits data at slower speeds, with lower data rates. – congestion: users can experience higher congestion, as many devices use the 2.4ghz band. this will cause discontinued connections and slower speeds. – overcrowding: 11 free radio air and channels available in the 2.4ghz band, depending on the country’s standards, less than the 23 available in 5ghz. 5.8 ghz - pros and cons pros – speed: 5.8ghz band sends data at faster speeds, with a higher data rate. – less congestion: 5.8ghz frequency experiences fewer interferences from other devices because fewer devices use 5.8ghz frequency. – less overcrowding: 5.8 ghz has more free radio air and channels, i.e., 23 working channels vs. 11 in the 2.4ghz band, depending on the country’s standards. cons – coverage: 5.8ghz provides a smaller coverage area. – interference: 5.8ghz band’s shorter waves make it less capable of going through walls and solid objects. this happens because, at higher frequencies, waves attenuate stronger. hence, the signal is easily affected by multiple obstacles. – cost: the cost of access points supporting 5.8ghz is higher. this is because 5.8ghz is newer in the market. according to the above theory, the propagation distance of 2.4g is much longer than 5.8g. however, in the real environment, due to the same frequency interference in the 2.4g frequency band, especially at long distances, the lower bandwidth causes the distance to be greatly reduced. the actual use environment of 5.8g is relatively clean, with fewer interference sources, and its bandwidth is wider, and the data transfer rate is high. compared with 2.4g, 5.8g has obvious advantages. therefore, if the transmission power is the same in the current environment, the transmission distance of 5.8g is longer than 2.4g. and because of the higher rate of 5.8g, the real-time image transmission is also clearer than 2.4g.