In computing, it is known as wifi (derived from the wifi brand). This telecommunications technology allows wireless interconnection between a computer and electronic systems, such as computers, video game consoles, televisions, cell phones, players, pointers, etc.
This technology allows these devices to connect to exchange data, or to connect to a wireless network access point, thus being able to have an Internet connection.
And although the wifi brand identifies a corporation that certifies the necessary standards of the technology with this connection capacity, the term wifi is commonly used to refer to the latter and not to the company.
Wifi arose in response to the need for standardization and compatibility in the wireless connection models of various digital devices, surpassing other non-compatible forms of connection such as Bluetooth, GPRS, UMTS, etc. Unlike these, wifi uses radio waves as a vehicle for transmitting the information.
This technology is designed to connect devices over relatively short distances (100 meters maximum), especially in environments that offer a lot of interference or noise to the signal. These are produced by saturation of the radio spectrum due to the multiplicity of emissions. Also, it is a slower connection than wired but significantly more comfortable and versatile.
The other disadvantage of connections of this type has to do with security since any device that captures the signal can access the transmitting point. This is usually configured through passwords and other security mechanisms, but the possibility of a cyber breach is always latent.
What is wifi for?
Wifi is used to connect devices or to an Internet access point, over short distances, such as those in our home, or inside a vehicle, or on each floor of a small building.
Thus, cables and other devices are dispensed with, as it is enough that each computer or device has a receiving antenna and has if any, the security password to access the point. In this way, local networks can also be conveniently established, and data can even be shared between different types of devices, such as cell phones, televisions, and computers.
Types of wifi
According to the standards they use for their identification, various types of wifi are known, which can be distinguished into two categories:
- 2.4 GHz band. Here are the IEEE 802.11b, IEEE 802.11g, and IEEE 802.11n standards, whose handling is international and allows speeds of 11 Mbit / s, 54 Mbit / s 300 Mbit / s respectively. However, it is the type that counts the most interference, since Bluetooth and other wireless systems also use the 2.4 GHz band.
- 5GHz band. The new type of wifi, known as WIFI 5, applies the IEEE 802.11ac standard and operates on a completely new channel free of interference, so, despite being a recent technology and having the disadvantage of 10% Less throw distance, it is considered extremely convenient given its stability and speed.
How does wifi work?
Wifi operates in much the same way as cell phones or radio transmitters. Initially, the data on an Ethernet connection is decrypted by an ordinary modem, which transmits its decoded signal to a wireless router or router, which transmits it as radio waves around it. In many cases, both devices already consist of one device, which fulfills both functions: it receives the broadband signal and interprets it as radio waves.
Then, the wifi device on our computer or cell phone, to cite an example, interprets these radio signals and converts them into information again. The cycle then repeats itself when our device sends instead of receiving information, and so on and simultaneously.
In some places where a wifi network is poor or difficult to spread, repeaters are implemented: devices that extend the coverage of the radio network, connecting to the weak signal, and re-emitting it more powerfully, thus allowing equipment out of range. The original signal can access it.