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There was a time when you’d only find WiFI at certain airportscoffee shops, or hotels. Nowadays, wireless networks, also called WiFi or Many cities are also using the technology to provide free or low-cost internet access to residents. WiFi has a lot of advantages. Wireless networks are easy to set up and inexpensive. They’re also unobtrusive — unless you’re on the lookout for a place to watch streaming movies on your tablet, you may not even notice when you’re in a hot spot.

In this article, we’ll look at the technology that allows information to travel over the air. We’ll also review what it takes to create a читать далее network in your home. A wireless network uses radio wavesjust like cell phones, televisions and приведу ссылку do. In fact, communication across a wireless network is a lot like two-way radio communication.

Here’s what happens:. The process also works in reverse, with the router receiving information from the internet, translating it into a radio signal and sending it to the computer’s wireless adapter. The radios used for WiFi communication are very similar to the radios used for walkie-talkies, cell phones and other devices. They can transmit and receive radio waves, and they can convert 1s and 0s into radio waves and convert the radio waves back into 1s and 0s.

But WiFi radios have a few notable differences from other radios:. WiFi uses Other WiFi radios can transmit on any frequency band. Or they can “frequency hop” rapidly between the different bands. Frequency hopping helps reduce interference and lets multiple devices use the same wireless connection simultaneously.

As long as they all have wireless adapters, several devices can use one router to connect to the internet. This connection is convenient, virtually invisible and fairly reliable; however, if the router fails or if too many people try to use high-bandwidth applications at the same time, users can experience interference or lose their connections, although newer, faster standards like You may be wondering why people refer to WiFi as The The IEEE sets standards for a range of technological protocols, and it uses a numbering system to classify these standards.

A WiFi hot spot is simply an area with an accessible wireless network. The term is most often used to refer to wireless networks in public areas like airports and coffee shops. Some are free and wireless all in one for dummies pdf free require fees for use, but in either case they can be handy when you are on the go. You can even create your own mobile hot spot using a cell увидеть больше or an external device that can connect to a cellular network.

And wireless all in one for dummies pdf free can always set up a WiFi network at home. If you want to take advantage of public WiFi hot spots or your own home-based network, the first thing you’ll need to do is make sure your computer has the right gear. Most new laptops and many new desktop computers come with built-in wireless transmitters, and just about all mobile devices are WiFi enabled. If your computer isn’t already equipped, you can buy a wireless adapter that plugs into the PC card slot or USB port.

Desktop computers can use USB adapters, or you can buy an adapter that plugs into the PCI slot inside the computer’s case. Many of these adapters wireless all in one for dummies pdf free use more than one Once you’ve installed a wireless adapter and the drivers that allow it to operate, your computer should be able to automatically discover existing networks. This means that when you turn your computer on in a Wireless all in one for dummies pdf free hot spot, the computer will inform you that the network exists and ask whether you want to connect to it.

If you have an older computer, you may need to use a software program to detect and connect to a wireless network. Being able /10604.txt connect to the internet in public hot spots is extremely convenient. Wireless home networks are convenient as well. They allow you to easily connect multiple computers and to move them from place to place without disconnecting and reconnecting wires. In the next section, we’ll look at how to create a wireless network in your home.

If you already have several computers networked in your home, you can create a wireless network with a wireless access point. If you have several computers that are wireless all in one for dummies pdf free networked, or if you want to replace your ethernet network, you’ll need a wireless router. This is a single unit that contains:. A wireless router allows you wireless all in one for dummies pdf free use wireless signals wireless all in one for dummies pdf free ethernet adobe pdf editor free download for windows 10 64 bit to wireless all in one for dummies pdf free your computers and mobile devices to one another, to a printer and to the internet.

Most routers provide wireless all in one for dummies pdf free for about feet If your home is very large, you can buy inexpensive range extenders or repeaters to increase your router’s range. As with wireless adapters, many routers can use more than one Normally, Once you plug in your router, it should start working at its default settings. Most routers let you use a web interface to change your settings.

You can select:. Security is an important part of a home wireless network, as well as public WiFi hot spots. If you set your router to create an open hot spot, anyone who has a wireless card will be able to use your signal. Most people would rather keep strangers out of their network, though. Doing so requires you to take a few security precautions. It’s also important to make sure your security precautions are current.

/16837.txt idea behind WEP was to create a wireless security platform that would make any wireless network as secure as a traditional wired network. You also can change other router settings to improve security. For instance, you can set it to block WAN requests to keep the router from responding to IP requests from remote users, set a limit to the number of devices that can connect to your router and even disable remote administration so that only computers plugged directly into your router can change your network settings.

You should also change the Service Set Identifier SSIDwhich is your network name, to something other than the default so that hackers can’t immediately tell what router you are using.

And selecting a strong password never hurts. Wireless networks are easy and inexpensive to set up, and most routers’ web interfaces are virtually self-explanatory. For more information on setting up and using a wireless network, check out the links that follow. Sign up for our Newsletter! Mobile Newsletter banner close. Mobile Newsletter chat close. Mobile Newsletter chat dots. Mobile Newsletter chat avatar. Mobile Newsletter chat subscribe. How WiFi Works. Wireless networks make it easy to connect to the internet wherever you go.

Contents What Is WiFi? What Is WiFi? Here’s what happens: A computer’s wireless adapter translates data into a radio signal and transmits it using an antenna. A wireless router receives the signal and decodes it.

The router sends the information to the internet using a physical, wired ethernet connection. They transmit at frequencies of 2. This frequency is considerably higher than the frequencies used for cell phones, walkie-talkies and televisions.

The higher frequency allows the signal to carry more data. The 2. In ideal conditions, the 5 GHz band has a max range of about feet 61 metersbut in the real world, it is much more prone to interference from walls, doors and other objects.

For a while, its cost made it popular, but now it’s less common as faster standards become less expensive. It can handle up to 11 megabits of data per second, and it uses complementary code keying CCK modulation to improve speeds. It uses orthogonal frequency-division multiplexing OFDMa more efficient coding technique that wireless all in one for dummies pdf free that radio signal into several sub-signals before they reach a receiver. This greatly reduces interference. It significantly improved speed and range over its predecessors.

For instance, although It is less prone to interference and far faster than its predecessors, pushing a maximum of megabits per second on a single stream, although real-world speeds may be lower. Like It is sometimes called 5G because of its frequency band, sometimes Gigabit WiFi because of its potential to exceed a gigabit per second on multiple streams and sometimes Very High Throughput VHT for the same reason.

This standard extends the capabilities of First of all, the new routers allow an even higher data flow rate, up to 9. WiFi 6 also lets manufacturers install many more antennas on one router, accepting multiple connections at once without any worry of interference and slowdown. Some new devices also connect on a higher 6 GHz band, which is about 20 percent faster than 5GHz in ideal conditions.

WiFi Hot Spots ” “. WiFi has enabled people to work anywhere they can get a signal, like at this coffee shop. Building a Wireless Network ” “.

 
 

 

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Get Smart at · makes your life easier with 1,s of answers on everything from removing wallpaper. Walter R. Bruce III is a writer and consultant who is an avid wireless network user and who has been programming and using computers since the late s.

 
 

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