WLAN. What is WLAN (Wireless Local Area Network)? WLAN: what is it, how is it different from Wi-Fi, WLAN in a phone What is wlan on a meizu smartphone

WLAN vs WI-FI

Efforts to improve data transmission technology are more about ease and convenience. Whenever possible, we always want less effort to communicate with others. Modern technological advances make it possible to transmit and receive digital information without physically connecting wires or fiber optics. Of course, for network administrators and engineers, nothing is more easy and convenient than wireless connectivity.

WLAN, abbreviated for wireless local area network and sometimes called wireless local area network, is a network of computers several hundred feet away that uses high frequency radio signals to send and receive data. A network can also connect multiple computers to a central information system, printer, or scanner. This enables mobility in the network (internet), which also helps to avoid the use of bulky and inconvenient cables for communication. IEEE 802.11 is the primary standard for wireless LANs.

In principle, a WLAN allows peer-to-peer and / or point-to-point data transfers, such as LAN-to-LAN, WLAN-to-LAN, or even WLAN-to-WLAN, in a relatively small area (building or campus). Conventional local area networks usually use twisted pair cables, coaxial wires, or in some cases optical fibers. A WLAN gets rid of these physical connections and instead uses electromagnetic waves to send and receive data over the network. Potentially, the transfer rate is not as fast as that provided by a regular LAN, but for most users, average and industry professionals, the slow transfer rate is a minor limitation.

WI-FI stands for Wireless Fidelity. This term is actually a brand name used to label products belonging to the WLAN device category. Devices or equipment marked with the WI-FI trademark are based on the standards specified in IEEE 802.11. In most cases, WI-FI is viewed by most as synonymous with the actual standard itself.

An association of companies around the world called the WI-FI Union supports WLAN technology and related products. This alliance also certifies various hardware and devices if they meet interoperability standards. It should be noted that there are many devices that do meet the standards but are not certified by the WI-FI Alliance and therefore do not have the WI-FI logo. The reason for this is the cost and hassle of the certification procedure.

A WI-FI device (ready) effectively means that it is ready for use on a WLAN. Such devices range from desktops, laptops, laptops to smartphones, palms, and other small devices.

1. WLAN is a type of computer network over a relatively small area that excludes the use of physical means of interconnection.

2. WI-FI is the brand name for branded devices that comply with IEEE 802.11 standards.

3. Devices in WLAN essentially use proprietary WI-FI products.

4. A WI-FI ready device simply means it is network ready in WLAN.

The World Wide Web is conquering every day more and more new positions on the market, in education, medicine, entertainment, as well as in the field of public services. Achievements of modern technologies and production have made even ordinary users the owners of several gadgets and devices at the same time: mobile phones and smartphones, tablets, laptops, computers and others.

All these devices must constantly or from time to time exchange information with each other and / or have an Internet connection to interact with remote devices and users.

To provide this opportunity at home, at work, in transport or on vacation are intended wireless communications, and above all local area networks (LAN, Local Area Network), in English - WLAN, which means Wireless LAN ("wireless LAN").

Wireless LAN concept

LAN, which used to be called local area network because it brought together desktops in offices, is now ubiquitous. If we classify LANs by the type of physical medium for transmitting digitized information, then we get two groups - wireless and wired LAN.

Wireless networks have become widespread, the devices of which communicate through a radio channel that meets the standard IEEE 802.11, otherwise called Wi-Fi ("Wi-Fi"), in English Wireless Fidelity - "wireless accuracy", which, as the developers admit, is meaningless in this context. The Wi-Fi cuts were just buzzed around and accepted as a brand of new technology.

Communication between WLAN and Wi-Fi

Wi-Fi is a cell with a diameter of up to 100 meters, within which a wireless LAN provides communication for many different gadgets and computers.

The range of a Wi-Fi signal depends on the medium through which it propagates. The maximum range is achieved in open spaces, for example, within a room, cafe halls, etc.

When passing through walls and ceilings, the signal is weakened, as well as if it encounters powerful sources of electromagnetic radiation - microwave ovens, etc.

Wireless LAN in the phone

Almost all modern mobile devices - phones, smartphones and tablets - are equipped with a connection to wireless LAN via Wi-Fi. In the simplest case, a mobile device joins a WLAN to access the Internet, without interacting in any way with neighboring devices that access the Internet through the same LAN.

Access to the Internet is provided by an access point - usually a router connected to the Internet provider with a cable or using a radio modem.

To connect your mobile device to WLAN based on wifi, you need to open the settings window, select the Wi-Fi field there and click on it to search for a network.

Benefits of wireless LAN

Wireless LANs save money by eliminating the need to lay and install cables and connectors. Benefits WLAN:

wherever the user is within the range of the Wi-Fi cell, he always has free access to the Internet;
the access point is organized simply and quickly enough;
the simplicity and speed of organizing a wireless LAN determine the low cost of its use;
if it is necessary to connect a larger number of clients, the network can be easily scaled towards increasing coverage and bandwidth;
the wireless LAN is compatible with a variety of mobile devices.

All this allows you to effectively use WLAN to provide all family members with the Internet,living in an apartment or in the country.

Connecting and configuring a wireless LAN

To organize a home wireless network, you need a router (router) , Internet access and a computer with a network adapter and the WLAN driver.

First, you need to find a suitable place for the radio access point, i.e. the router:

place the point at some elevation, preferably in the center of the living space;
avoid placing the router near high frequency emitters such as TVs, microwave ovens, etc.

Step by step guide

After the physical installation of the router, you must configure the access point. To do this, connect the network output of a wired LAN of a computer or laptop to the custom RJ-45 connector of the router and execute the following actions:

Open a browser and in the address bar type the IP address of the router, which is indicated in the operating instructions, usually 192.168.1.1. Press "Enter" (Enter).
The router will ask for a username and password. They are indicated in the instructions.
A check mark is placed opposite the WLAN position in the box. In the Name field, enter the network name for the list of active networks. Then enter the area, in the Channel position set to Auto. Click on the Apply button to save the settings.
To protect information in the Wireless Settings subsection, set the encryption protocol. This is usually WPA2 + PSK or the less powerful WPA + PSK. In the Pre-shared Key / Security Encryption field, type a password of at least 15 characters (15-22) and then save the settings (Apply).
Write down the list of devices allowed in this WLAN. To do this, go to the Advanced / Wireless Settings section and select the Setup Access List from the list.
Access control must be enabled to apply security settings. To do this, mark the checkbox (square) opposite the Turn Access Control On position.
There is a VPN section in the router menu - this is how the logical network is denoted for secure connections. To protect a Wi-Fi cell (often called a "hotspot") with a VPN, the free Hotspot Shield program has been developed.
Configure devices on the network using the wizard, similar to the values \u200b\u200bof the router.

After completing the listed steps, you will receive a wireless LAN for secure access to the public Internet.

Nowadays, there is an increasing need for access to information on the Internet at any time and anywhere in the world. This opportunity is provided by the wireless technology WLAN (Wireless Local Area Network). This technology does not use wired systems to connect and transmit information, but radio frequencies, this allows a huge number of users to be on the Internet at the same time.

In principle, this is a regular wireless Internet that can be used not only from a laptop or tablet, but also from a smartphone.

Today, such convenience is available in most modern models of various manufacturers. You can use the function for free and regardless of whether the device has a SIM card or not. The connection can be made in the "Wireless networks" settings while within the range of the access point. The only drawback of this technology is that in a Lenovo smartphone, like in any other mobile device, during a session of such a wireless connection, the battery is quickly discharged.

Setting up a wireless connection

When purchasing smartphones from Chinese manufacturers, many users do not take into account the Wi-Fi technology available in almost all mobile devices, which makes it possible to use the Internet through hotspots or access points.

Nowadays, many establishments provide the opportunity to use the Internet for free. But how do you activate this feature on your phone? The instructions below tell you how to set up a wireless Internet connection on your Lenovo in a couple of minutes.

It is necessary that the smartphone has been configured with GPRS in advance.
Find the Wi-Fi or WLAN icon in the device menu.
Open, and the menu that appears, select "Search for available networks".
Select the icon of an unblocked network.
In the options, check the "Connect" item.

If everything is done correctly, the Lenovo smartphone will connect to a free network and the corresponding icon on the screen will turn green or blue. After such a connection is made, you need to go to the browser and use the Internet.

In the options, you must select a network profile and "Profile mode" click the "Custom settings" button. Next, you need to select a SIM card through which you will access the Internet, and in the "Java Profile for SIM" press WLAN and OK, then select "Start". This completes the connection, and now you can freely use the Internet.

Warning!

While talking about all the advantages of free wireless internet access, don't forget about the disadvantages. The fact is that such use of Wi-Fi in public places implies an unsecured connection, since there is no need to enter a password.

Therefore, other members of the local network can see the Internet resources you visit and the data entered, and attackers are able to intercept them for their own purposes. Therefore, it is not advisable to enter passwords in such places and conduct financial transactions.

In principle, this is a regular wireless Internet that can be used not only from a laptop or tablet, but also from a smartphone.

Setting up a wireless connection

It is necessary that the smartphone has been configured with GPRS in advance.
Find the Wi-Fi or WLAN icon in the device menu.
Open, and the menu that appears, select "Search for available networks".
Select the icon of an unblocked network.
In the options, check the "Connect" item.