What is Wi-fi and WLAN:

Wi-Fi is modern, one of the most promising today wireless technology data transmission by radio channel. Wi-Fi technology provides freedom of movement, both within the same room and around the world, with high-speed access to all resources local network office and the Internet from a PDA, laptop, pocket computer, web-camera or wireless IP-phone in the coverage area of ​​the Wi-Fi network through the so-called access points or hotspots. Wi-Fi provides mobile PC users with more opportunities to work and play outside the home or office: in hotels, airports, cafes and other places equipped with Wi-Fi access points.

Wi-Fi usually pronounced as [wi-fi], but it is correct to say [wi-fi]. Wi-Fi is abbreviated from the English phrase "Wireless Fidelity", translated from English means - accurate wireless transmission data, wireless dedication, in a wireless key. Wi-Fi technology is also called the protocol and standard IEEE 802.11 (a-r) (2.4 GHz and 5 GHz band) for equipment for broadband radio communications, designed to organize local wireless networks Wireless Local Area Network (WLAN). The Wi-Fi logo denotes product-specific WLAN compatibility, but if your computer has the Intel® Centrino ™ logo, it is fully Wi-Fi ready and no additional devices Not needed.

What is Wireless Local Area Network (WLAN)?

WLAN is a type of local area network that uses high-frequency radio waves to communicate and transfer data between nodes, rather than cable connections. Installation of such networks is recommended where installation of a cable network is impossible or economically impractical. Thanks to the handover function, users can move between access points across the Wi-Fi coverage area without breaking the connection. it flexible system data transmission, which is used as an extension or alternative to a cable local area network within one office, building or within a certain area. Wi-Fi allows you to save money by eliminating the need to lay cables, and the ease of installation does not take time for complex installation work. Expanding and reconfiguring a WLAN network is not a difficult task, user devices can be integrated into the network by installing wireless network adapters... Wireless networks use radio frequencies because indoor radio waves travel through walls and ceilings. The range or coverage area of ​​most WLAN systems is up to 160m, depending on the number and type of obstacles encountered. Wireless networks usually more reliable than cable.

The speed of operation is comparable to the speed of a cable network. Just like in a regular network, throughput WLAN network depends on its topology, load, distance to access point, etc. The number of users is almost unlimited. It can be increased simply by installing new access points. With overlapping access points tuned to different frequencies (channels), the wireless network can be expanded by increasing the number of users in the same area. Wi-Fi technology provides simultaneous work in the network of several dozen active users, the data transfer rate for the end user can reach 108 Mbps.

2009. NEC Introduces Wi-Fi / WiMax Router

NEC has introduced a compact Mobile WiMAX router with Wi-Fi WLAN functionality. The device is equipped with lithium-ion battery and can be used even outdoors. The router can work in offline for two hours. The company did not disclose when the first WiMAX routers, which allow organizing WLAN networks, will appear on the mass market. NEC intends to wait for more adoption of Mobile WiMAX technology, and then a new product will be launched.

2008. WLAN will become the most widespread communication technology

Analysts from Berg Insight conducted a study, the results of which showed that the next most common communication technology on the market mobile phones will become WLAN (Wi-Fi, WiMAX). In 2007, the number of mobile phones with WLAN support was 27 million, and by 2012 this figure will increase to 400 million. WLANs will be used for high-speed Internet access at home and in the office and for file transfer.

2007. HP WLAN Products

ProCurve Networking by HP has announced products designed for wireless LANs for small businesses with limited IT staff. They include the lifetime warranty ProCurve Wireless Access Point 10ag, which is compliant with IEEE 802.11a / b / g standards and is easy to install and operate. Mobility Manager 2.0 management software is used to install wireless networks and visualize their equipment. In conjunction with the supplement HP ProCurve Manager Plus Software, it provides the ability to deploy, administer and monitor both traditional and wireless LANs. The new AP is priced at $ 239, management software $ 30,000 with unlimited network device licenses, and $ 4,000 with 100 licenses. According to Dell "Oro Group, HP has a 1.4% share of the $ 1.3 billion global enterprise wireless market, which is in seventh place, with Cisco, Motorola and Aruba taking the top three.

2007. Cisco enhances WLAN security

Cisco Systems has released security updates for its wireless LAN product management software. This patch set is for the Wireless Control System software, which is used to manage Aironet Lightweight Access Points, Wireless LAN Controllers, and Wireless Location Appliances. Wireless Control System updates eliminate the possibility of unauthorized access to information, changing user privileges, and unauthorized access to the network. Another set of updates is used in WLAN controllers, Catalyst switches, and Aironet 1000 and 1500 series access points.

2007. Foundry launches WLAN products

Foundry Networks has unveiled hardware and software for deploying wireless LANs. Based on Meru Networks technology, the Foundry IronPort Mobility AP150 Access Point is capable of supporting up to 120 wireless connections and can be used in sites with significant network traffic. The IronPort Mobility Radio Switch 4000 offers 802.11a and 802.1 connectivity and supports up to 256 connections. Together with IronPort Wireless Location Manager 2.02, it can detect and localize rogue access points, as well as inventory network devices and determine the number of active subscribers on the network. New devices are able to provide the required level of quality of service, highlighting a certain type of traffic in the wireless network. The announced products will begin shipping in April. The cost of the switch, depending on the type of antenna, is $ 2.1 or $ 2.2 thousand, access points - $ 525, version 2.02 of Location Manager software - $ 8 thousand.

2006. Zyxel Launches Office Wireless LAN System without WLAN Switches

Zyxel has released an office wireless LAN system without WLAN switches for small and medium-sized businesses. The system uses Extricom technology to eliminate the hassle of routing signals between multiple access points on a Wi-Fi network. Using the same wireless channel for all APs, Extricom provides continuous indoor coverage and tight (no roaming) client connections, greatly simplifying WLAN scheduling and eliminating the possibility of adjacent channel interference. Extricom competitors, such as Aruba, point to a disadvantage this approach is the increase in the cost of access points and their "closeness", non-compliance with accepted standards.

2004. WLAN - under control

Computer Associates International is preparing to release its Wireless Site Management toolkit. Currently software is in beta testing. The system provides functions for automatic generation and distribution of encryption keys, as well as their rotation at a given frequency. WSM allows administrators to set access perimeters and "figure out" unauthorized devices connecting to the network. As a monitoring tool, WSM measures and monitors network performance by generating reports and performing load balancing. There is a possibility of assigning priorities different types traffic. Features are provided to help ensure that network performance meets service level agreements.

2004. Towards WLAN Equipment Compatibility

This year, within the framework of the IETF, working group Control and Provisioning of Wireless Access Points (CAPWAP), whose task is to study the possibility of ensuring the interoperability of wireless LAN equipment from various manufacturers. CAPWAP analyzes existing models of access points (APs), methods of forwarding traffic between APs in the network, and the operation of WLAN switches. The result of CAPWAP's activities should be a report, guided by which it will be possible to start developing an access point control protocol. The group is expected to publish the first fruits of its labor in July. Meanwhile, there are already at least two versions of the access point control protocol that have been submitted to the IETF as a possible standard. These are the Lightweight Access Point Protocol (LWAPP), developed by a small group of hardware manufacturers led by Airespace, and the CAPWAP Tunneling Protocol (CTP) recently proposed by Chantry Networks and Propagate Networks. The protocols differ in the spectrum of supported WLAN topologies and standards and in the methods of exchange of information between devices about their functions and features.

2003. Wi-Fi coverage radius can be increased by 5 times

The Wi-Fi chipset, which is being tested by start-up Airgo Networks, will improve the performance of 802.11a wireless networks. The company claims that APs will provide 2.5-5 times more coverage than existing ones, and 2-4 times more bandwidth: the radius of the coverage area of ​​APs based on a chipset will be at least 90 m, and the minimum bandwidth will be 34 Mbps. The company attributes the performance improvement to what it has achieved through its multiple-input multiple-output (MIMO) method, which turns weaknesses in radio technology into benefits. Airgo chips receive and transmit a signal using several antennas: two on client adapters, three on access points. When a signal is transmitted from one antenna, it is reflected from various objects, creating multipath and distortion effects; the receiver selects the strongest signal for processing. The chips implement all Wi-Fi security standards: Wired Equivalent Privacy, Wi-Fi Protected Access, VPN termination, 802.1x authentication, and AES encryption.

2003. Protective wireless data transmission network of RAO "UES of Russia"

The construction of a secure wireless data transmission network for RAO "UES of Russia" has been completed. The company "Orion-energo" took part in the construction in cooperation with the companies "ELVIS +" and ArtCommunications. On the this moment it is the largest office network in Russia. It includes 55 base stations of the Cisco AIR AP-1220B type. The Cisco Access Control Server authorization server is used to ensure network security. The ELVIS + family of VPN agents "Zastava" provides protection of the traffic of wireless network subscribers based on a cryptographic module. The CiscoWorks WLSE (Wireless LAN Solution Engine) hardware and software complex is used to manage and monitor the network.

2003. Bluesocket Introduces Wireless LAN Gateway

At NetWorld + Interop, Bluesocket showcased the new WGX-4000 switch gateway for managing large-scale wireless LANs. The maximum throughput provided by the gateway is 800 Mbps. The architecture of the device does not require the installation of additional software on client devices and access points, which is usually required for VPN based on IPSec. Software device allows all gateways on the network to communicate with each other without using a central server. The WGX-4000 is equipped with eight 10/100 Ethernet ports for direct AP connection different manufacturers as well as a Gigabit Ethernet port for connecting to a backbone router. The WGX-4000 is equipped with eight 10/100 Ethernet ports for direct connection of APs from various manufacturers, as well as a Gigabit Ethernet port for connection to a backbone router. Simultaneously with the registration in the local network, the gateway transparently authenticates users in Windows NT domains, Windows directories Active Directory and other environments.

In the comments, they often ask questions about the fact that the laptop does not see the Wi-Fi network. (although wifi is on), or you can't start Wi-Fi sharing on your laptop. Very often, such problems arise due to the fact that the WLAN autoconfiguration service is disabled. There is such a service in Windows, it manages wireless connections. So, if the WlanSvc service is stopped, then you will not be able to connect your computer to Wi-Fi, or start an access point on your laptop.

If you just want to connect your laptop to a Wi-Fi network, then due to the stopped WLAN autoconfiguration service, the laptop simply will not see the available wireless networks. There will be a status. And when you try to distribute Wi-Fi from a laptop, the error "Failed to start the WLAN auto-configuration service (1068)" will most likely appear. In any case, this problem needs to be corrected somehow. You just need to check if this service is running on your computer. And if not, then launch it and set automatic launch in the settings.

I will show you how to enable the WLAN autoconfiguration service in Windows 10. But if you have Windows 7, 8, or even Windows Vista, then everything will be exactly the same. The process itself is no different.

What is WLAN Autoconfiguration Service?

If without complicated and boring terms, then this service in the operating room Windows system manages all wireless connections (Wi-Fi and Bluetooth). That is, the WlanSvc service is responsible for finding, connecting, disconnecting and other operations that are necessary for the wireless connections to work on a laptop. It is clear that if this service is stopped, then Windows will not be able to see the available wireless networks, and will not be able to connect to them.

There may also be a problem when trying to start the distribution of a Wi-Fi network in the command Windows prompt... If this service is stopped, an error will appear: "The Wireless AutoConfiguration Service (wlansvc) is not running."

Basically, this is all we need to know about the WLAN autoconfiguration service. On the system, this feature is always enabled by default. You ask, why then it needs to be turned on? Everything is very simple, there are many instructions on the Internet where it is advised to disable this service "to make the computer work faster." Also, some programs can disable the service, especially various system optimizers like to do this. And if you do not have the original installed windows image, and assembly, then the service can be disabled immediately after the installation of the system.

Yes, if you do not connect your computer to wireless networks, then you do not need this service, the computer will work fine without it. But, this is not a reason to turn it off.

How to enable WLAN autoconfiguration service in Windows 10, 8, 7

Press the keyboard shortcut Win + R... The Run window will appear. We enter the command " services.msc", and click" Ok ".

We put "Startup type" - "Automatic". Click the "Ok" button and "Apply".

Reboot your computer. After these steps, everything should work.

What if the WlanSvc service won't start?

If you are faced with the fact that the WLAN autoconfiguration service does not start, then the problem may be that the service itself is completely disabled. Let's check it out and enable it.

Press the keyboard shortcut again Win + R, but this time we enter " msconfig", and click" Ok ".

We find the service we need in the list, and see if there is a check mark next to it. If not, then put it, click "Ok", and "Apply".

Reboot your computer.

Update: enable "Normal startup" if error 1068 appears

This decision was shared with us in the comments. It is very simple and helped to get rid of error 1068 when starting the WLAN service... Press the Win + R key combination on the keyboard, copy the msconfig command to the appropriate line and click Ok.

Set the startup option "Normal startup", click on the "Apply" button (must be active) and "Ok".

Restart your computer.

If these tips did not help you solve the problem, then describe it in detail in the comments. If there is a problem with connecting to Wi-Fi, then see the article. And if you went to this page to find a solution to the problem with distribution of Wi-Fi from a laptop, and the method described above did not help, then see the solutions in the article.

How do I set up a WLAN?

In this article, I will explain how to set up a WLAN (Wireless Local Area Network) and make this network secure.

First, you need to choose a normal WLAN router, you can quickly exchange data over a wireless network only when it complies with the 802.11n standard, which supports speeds up to 300 Mbps, but this standard has not yet been finally approved, most of the routers have 802.11g standard, providing speeds up to 54 Mbps, this will be enough for a high-speed Internet connection. I recommend buying a NETGEAR WNDR3300 router, it has good characteristics.

Fig. NETGEAR router WNDR3300

The router should be positioned so that interference from radiotelephones microwave ovens etc. did not block the access of the router signal, because many devices operate at 2.4 GHz, like Wi-Fi. It is better to fix the router as high as possible on the wall, and it is better to direct the antennas vertically.

Secondly, we will configure the router, I will tell you how to do this using the NETGEAR WNDR3300 as an example, but you can configure it in the same way on other routers.

Open the router settings page, type in the address bar Internet Explorer- 192.168.1.1, press Enter, in Basic Settings you need to enter data to access the Internet connection and click Apply, then go to Wireless Settings, in Name (SSID) enter the name of your network, under this name it will be shown in the list available networks on other devices, in next line region, then select Auto in Channel - this is necessary in order for the router to select the channel with the least amount of interference, click Apply again.

Now, to protect yourself, you need strong password so that no one can access the Internet through your connection. WLAN security includes different methods encryption: WEP, WPA and WPA2. I recommend choosing WPA or WPA2, for this, on the Wireless Settings tab, you must activate WPA-PSK (TKIP) or WPA2-PSK (AES), when Security Encryption is requested, you need to set a password, this password must be more than 15 characters, click Apply. In the router, we register the MAC addresses of only devices known to you in order to exclude other devices from accessing the router. To do this, in the Advanced menu item on the Wireless Settings tab, select the Setup Access List and from the list of connected devices select those that you want to open access to and click Add. Check the box next to Turn Access Control On, click Apply. Everything, secure network ready.

For safety when connecting to points Wi-Fi access you can use the Hotspot Shield program, which creates a VPN (virtual private network) between a computer or laptop and a wireless access point (WLAN router), thereby creating protection when transmitting and receiving data. You can read about Hotspot Shield.

We configured that, but the network refuses to work, what should I do?

You need to figure out what the matter is, it is possible that your network may be blocked by another Wi-Fi network, other networks can be determined using the NetStumbler program, this program will show the neighboring networks and on which channels they operate. And try to set a different channel in the router settings, different from the channels of neighboring networks.

If your network is working normally, but the connection is intermittently interrupted, perhaps the reason is a voltage drop in the supply network, because even a small voltage drop is enough for the router to lose connection, so that this does not happen, you need to connect the router through a small uninterruptible power supply.

Also, data may not be transmitted over the network due to incorrect IP configuration, you need to check in the router settings if the DHCP server is enabled, if there are several devices on the network that can be DHCP servers, they may conflict, to track what is conflicting, run the program DHCP Find.

If you cannot access the Internet, then you need to configure your browser: in Internet Explorer, click Service - Internet Options, on the Connections tab in the LAN Settings section, uncheck all the checkboxes in front of all the items and, on the contrary, we also uncheck Automatic parameter detection if you have a different browser. then there are similar settings.

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 technology wireless connection 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, this 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, as in any other mobile device, during a session like wireless connection the battery runs out quickly.

Setting up a wireless connection

When purchasing smartphones from Chinese manufacturers, many users do not take into account the existing in almost all mobile devices Wi-Fi technology, 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 to activate this function on your phone? The instructions below tell you how to set up in your Lenovo in a couple of minutes wireless communication with the internet.

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

If everything is done correctly, then 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, do not forget about the disadvantages. The point is that such use of Wi-Fi in public places implies unsecured connection as there is no need to enter a password.

Consequently, 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.