What is WiFi?
WiFi is also known as the 802.11b standard. The biggest advantage is that the transmission speed is fast, which can reach 11Mbps. In addition, the effective distance of WIFI is also very long. It is also compatible with existing 802.11DSSS equipment.
The IEEE (Institute of Electrical Technologists) 802.11b wireless network specification is derived from the IEEE 802.11 network specification. The maximum bandwidth reaches 11Mbps. In the case of weak signal or interference, the bandwidth can be adjusted to 5.5Mbps, 2Mbps and 1Mbps, and the automatic bandwidth adjustment can effectively ensure the stability and reliability of the network. Its main features are fast speed and high reliability. The communication distance in the open area is 305 meters, and the communication distance in the closed area is 76 meters to 122 meters. It is easy to integrate with the existing wired Ethernet and the network cost is low.
Wi-Fi is the abbreviation of Wireless Fidelity, which is the same as wireless fidelity and Bluetooth technology. It is a short-range wireless technology used in offices and homes. This technology uses a bandwidth of about 2.4GHz, which is a currently unapproved wireless bandwidth. There are currently two standards: IEEE802.11a and IEEE802.11b. This technology is popular with manufacturers for its own advantages.
WIFI is a wireless network composed of access points (AP) and wireless cards. Often referred to as a bridge or access point, as a bridge between traditional wired and wireless LANs, PCs with wireless cards installed can share wired LANs through APs. Even the resources of the WAN, its working principle is equivalent to the routing of the hub or the built-in wireless transmitter, and the wireless card is the client terminal device, which is responsible for receiving the signal sent from the AP.
Advantages of WIFI
First of all, the radio wave shielding range is wide, and the radio wave shielding range based on Bluetooth technology is small, with a radius of about 50 feet (about 15 meters), and the radius of Wi-Fi is about 300 feet (about 15 feet). 100m) Offices can also be used throughout the building, of course.
However, the quality of wireless communication transmitted by Wi-Fi technology is not very good, and the data security performance cannot reach the road of Bluetooth transmission. The transmission quality of WiFi technology needs to be improved, but its transmission speed is very fast. It can reach 11mbps, which can meet the information needs of individuals and society.
In addition, the barriers for manufacturers to enter the field are relatively low. Manufacturers only need to set up "hot spots" in densely populated areas (airports, stations, cafes, libraries, etc.) to connect to the network with high-speed lines. In this way, the radio waves from the "hot spot" can reach a distance of 10 meters to 100 meters from the access point, so users can access the Internet at high speed as long as they have a laptop or PDA that supports wireless LAN. In other words, manufacturers do not need to spend a lot of money to access the network, which saves a lot of money. And compared with the wired network, WiFi has three main advantages: wireless connection, more secure and convenient, and can work at a distance.
The development trend of WiFi
Everyone feels differently when it comes to wireless networking. Is wireless just connecting two computers? The answer is definitely not like this. If it was in the last century, there would be no problem in saying this. In this era of highly developed Internet, the next-generation wireless network does not require cable wiring or can be used relatively freely, and establishes a new feeling of wireless LAN.
Demand determines the development of the market, and access to the Internet is not restricted anytime and anywhere, and there are few IT technologies and products that can grow rapidly. But in any case, WiFi plays a pivotal role!
