Question

wi-fi的好处和坏处写一篇英语作文

Answer 1

您好：
The wireless network can be said that it is relative to a new network we present widely used wired network form. Many people call the wireless network is a new way to access the Internet from a plait, wireless network threw the wired network must rely on the network to a certain extent. In this way, any corner you can sit at home, hold your laptop, enjoy the fun of network wiring position, rather than the usual, must want to indulge in the network interface. Your home is not a root of the network in a mess, the downside is that electromagnetic radiation, a move right, pregnant women should not use, the German government has recently issued a warning that people should try to avoid the use of Wi-Fi, because the wireless network technology may bring harm to human health. The official German radiation protection organization suggested that people should use fixed line instead of the phone as much as possible, and the time of electromagnetic radiation on the all kinds of daily necessities, including baby monitors and an electric blanket. As is known to all, the loss of the wireless signal transmission distance, medium or other factors will cause. The wired network and wireless network are the signal attenuation, compared with wired networks, wireless local area network technology as the transmission in the air, influenced by the environment more. With the increase of the distance or the obstacle signals will decline, so that the actual transmission distance is often less than the maximum limit.
Especially in the interior of many obstacles, the frequent use of electrical equipment, make the distance shortened, the signal strength is not enough, the transmission speed is reduced, resulting in dropped calls. In this regard, the WLAN layout can pay attention to avoid the wireless device and the bearing wall, metal and other face.
In addition, some strong interference source will cause signal instability or serious decay, resulting in frequent dropped calls. In particular, refrigerator, microwave oven of high-power electrical appliances, wireless equipment should pay attention to and keep a certain distance.
The strong signal interference distance wireless equipment and cabling within 100 meters of the radio tower, electric welding machine, electric or high-voltage power transformers and other sources, may also produce strong interference on the wireless signal or equipment, also need to pay attention to avoid.
In addition, such as a wireless device is too far away to the speed of WLAN is greatly reduced, has been difficult to meet the demand of broadband transmission, can temporarily turn it off, or make some adjustments on its location, and through adjusting the angle of antenna and location of the products, reduce environmental interference to improve the connection status.
Transmitting or receiving power is not enough, can also be used for high sensitivity radio equipment or add a high gain antenna is improved, new equipment and signal transmission distance and stability can be compared with the old product is greatly improved, can consider to choose the new products in order to improve the transmission speed and stability, lower dropping distance transmission rate.

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