wi-fi

Notebook battery life

In the case of you do not want to interrupt a task we are doing in the notebook for lack of energy, it is necessary to pay attention to how the laptop battery is used. It is important to check in the device which is the effective length of battery.

If you spend hours working on the notebook, it is necessary that the battery has a duration of two or three hours. To know a little more, the capacity of a battery depends on two factors: the number of cells and the material it is made.

Laptop battery life tips

The user can find on the market batteries from 4 to 12 cells. The more cells, the greater the weight, but at the same time, the greater its duration. If you want to know even more, we recommend you to continue reading the article.

About 95% of the batteries found in the notebook market are made of lithium ion, are more compact and less aggressive to the environment. Ideally the user to change the battery of the notebook every two years, as they have a limited shelf life.

Some tips for a longer life of the battery

It is important that every 2 or 3 weeks before charging, use the battery do until completely exhausted.

Whenever possible you should use the notebook connected to the power outlet. From the time when the battery is charged, the notebook senses this and go on to use only electricity.

While this contradicts the tips that can be read in many blogs and Internet sites, which says that when we use the power supply plugged into the laptop, it is better to remove the battery to extend its life.

Laptop battery life tips

If you want to know more about the characteristics of rechargeable batteries, we suggest reading this article.

As we know, the operating system of the notebooks have different profiles settings energy consumption. With the correct choice of one of these profiles, we will make the battery life of the notebook is noticeably longer.

In the case that the Wi-Fi sensors are not used, you have to turn it off. A wireless network adapter sensor power on, will make this consumes power constantly. In the same way for the Bluetooth or infrared ports.

Optimize the screen. The monitor of the notebooks is one of the devices higher incidence on the duration of the battery charge. That is why we must adjust the brightness with the lowest possible intensity. Another good resource is to use a dark desktop wallpaper, the darker it is, the less energy it will consume.

Laptop battery life tips

If the notebook is connected to any type of PCMCIA card and not in use, it should remove it as it consumes battery power.

Also, and logically, the greater number of programs are running at a time, more work has the processor and therefore more amount of energy consumed. It is advisable to optimize the applications that are loaded when you start Windows, and of course, try to run few programs simultaneously.

Another problem are the spywares, software that use too many resources. You need to keep the notebook clean from spy programs, because this type of malicious programs are constantly running, with the consequent battery drain.

Laptop battery life tips

Avoid using applications that use the CD or DVD. These devices have a high energy consumption and if we want the battery life is as long as possible, we must try to download as much as possible using the net connection, when it comes to getting drivers and software.

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All about SD Memory Cards

“It seems incredible that a piece of plastic so small to be able to store as much information”. Most likely is that is the thought that crosses our minds every time we have in our hands a memory card. This reflection has, of course, a good solid grip. Those who that remember the old diskettes, with its huge size and its 360 Kb. of capacity, knows the hardships they suffered whenever had to store something that occupied more of this limitation.

Of course the computer at that time was much simpler, and scenarios to need more of that capacity, limited. But since those days until today, technology has advanced, allowing the creation of increasingly precise and complex instruments, and with them came the need to store the huge amount of data they generate or they need to function.

All about memory cards

It is currently not possible to think about to buy a device without accompany it with its corresponding SD memory card. We’re not just talking about digital cameras, but also video cameras, MP3 players, PDAs, GPS, smartphones, tablets, TV Box and many other electronic devices, each with its corresponding type of memory card. Therefore it is good to be informed about the various options that exist in SD memory cards, information that can be obtained easily if continues reading this article.

While on the market there a wide variety of memory cards from different manufacturers and with many different purposes, such as Compact Flash, Memory Stick, MultiMedia Card and others, the truth is that the most popular format memory card is called card SD memory, acronym of Secure Digital, the which has very good references of all who use it daily, and that is why it has become a standard widely used, together to their “brothers” Mini SD and Micro SD, the latter being the most widespread.

All about memory cards

Main features of the SD Memory Card

Some interesting features found on SD memory cards are its small size and large capacity, as well as its compatibility with all kinds of devices, points that will explain below in the article.

Formats SD memory cards

The format is asymmetrical, therefore no risk of being inserted by mistake on your computer, besides having a good small size:

 

Traditional SD Memory: 32 mm x 24 mm x 2.1 mm
Mini SD memory: 20 mm x 21.5 mm x 1.4 mm
Micro SD memory: 11 mm x 15 mm x 1 mm

 

Storage Capacity SD Card

The SD memory card offers different storage capacities: 8, 16, 32, 64, 128, 256 and 512 MB, although such cards are hard to find, as they have been replaced in the market for cards with much greater capacity: 8, 16, 32 and 64 Gb, and until they can even reach up to 128 Gb. of storage space. It is important to remember that not all computers have support for cards with 2GB or more, due to the difference in formatting (sometimes the problem is solved by firmware upgrade that computer).

All about memory cards

First, it is important to decide the storage capacity of the memory card. But we should not get a wrong idea, because the capacity bought never enough, much less in the camera of a teenager who is on vacation!

The fact that digital cameras offer more and more megapixels without increasing the price, creates the need for more memory to fit the photographs, a higher definition occupy more space.

All about memory cards

Card compatibility SD, MiniSD and MicroSD

In this sense, MicroSD type cards are more compatible than MiniSD and the SD type, perhaps because they are the most widespread type of memory market. Used by countless manufacturers of digital machines such as Casio, Canon, Nikon, Pentax, Kodak, Panasonic, Konica/Minolta and manufacturers of electronic devices around the world, are included with all kinds of devices like smartphones, tablets, PDAs, mp3 players and much others. However, if your device only accepts SD cards type, also called Transflash, this is not inconvenient to use, because in the market there are adapters that can convert a MicroSD or MiniSD memory card into SD type.

SD memory cards safety and security

The SD memory cards have a physical lock system which prevents the writing on the card, similar to the recording obstacles included in the old 3.5 diskettes, although the market we can find cards cheaper models without this feature. However, unlike diskettes, this blocking is performed by the firmware of the device detects that the key is activated.

The card contacts are placed in a depression of the card, so as to avoid contact with the dirt left by hands and other materials.

All about memory cards

Memory cards speed

Memory cards can have different transfer rates (which also varies in price), according to the version used. Speed is measured in multiples of 150K (equal to CD-ROM). The most usual is to find cards or equipment that use up to speeds of 16x (2.4 MByte / sec), and some faster than 66x (10 MByte / s), although they can also be ultra-fast 150x or even 133x cards.

In fact, many times the speed and capacity to transfer data to the computer of these cards can only be exploited if we have a USB 2.0 port. However, if you are thinking of using more advanced equipment and professional semi-professional camera, or SLR, will certainly better benefits in the use of faster memory cards.

Memory card peed table

 

4x: 600 KB / s
16x: 2.4 MB / s
32x: 4.8 MB / s (SanDisk Pro)
66x: 10MB / s (SanDisk Extreme, SanDisk Ultra II)
133x: 20 MB / s (SanDisk Extreme III, Lexar Professional)

 

Other functions:

Because of its great popularization, the SD Card Association, entity responsible for the standardization of this class of devices, defining today the new features and applications such as the ability to add a Wi-Fi device within the card itself, devices that can already be found in some electronics stores.

All about memory cards

Examples of such implementations are:

SD Card with Copyright, used for film distribution, which allows the user to purchase an SD Card containing a DVD movie format, which can be played on computers and portable devices like PS3.

Using SDIO technology, which allows, using the dimensions of the card and using their pins, the use of devices such as Bluetooth and Wi-Fi receivers, among others.

While this format is here to stay, there are significant differences in features, capacity and price. It is therefore necessary, before buying, learn more to better select the model that will bring the expected result in our equipment.

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USB dongle types: Wi-Fi

As we know, a dongle is a small hardware device that connects to another device to provide it with additional functionality. Over the years, the dongles have become one of the main tools for better job flexibility, since they offer important features that otherwise we could not be used.

As proof of this, the dongle USB devices have not only become one of the most used for storing digital files means, but also constitute a really interesting option to transfer information between computers and peripherals, as well as to share the network connection.

USB dongle types

Thanks to its capacity and effectiveness, USB dongles have become one of the best alternatives for storing files, even replacing other media, such as optical disks.

However, as we mentioned above, dongles not only serve to store files. There are also different types of USB dongles, such as those that let you add extra features to computers to use wireless Internet access, thereby providing wireless connectivity to the network.

Consider that many desktop computers do not have this type of connectivity, so they must be incorporated in an internal Wi-Fi card, while in some laptop models this type of functionality is obtained by external gadgets.

USB dongle types

Therefore, often the best solution is to opt for a USB dongle for Wi-Fi, which currently can be found in the market in variety of models, whose function, once connected to the PC, will be to locate nearby wireless networks in order to share access.

Overall, one of the most popular models of USB dongle for Wi-Fi, so-called Wi-Fi scanner, it is one that has shaped USB key, which gives users the ability to search an access to connect to Internet.

This type of USB dongle has a set of LED lights, which are lit without the computer, either desktop or laptop, it is on. The lights will indicate whether it has detected the presence of a wireless network.

USB dongle types

Some models even feature a series of LEDs that indicate the signal strength, thereby allowing us to know at the time if accessibility is increasing or not. In addition also they include different colors of LEDs that specify whether the network is encrypted or not.

We can also opt for the possibility of creating a personal wireless network through a USB Bluetooth dongle, which allows us to connect various digital devices to each other without the need for wiring.

In this sense it is important to highlight the importance acquired in recent years the use of Bluetooth, technology is making strides, and because of its powerful features are increasingly portable devices that have this type of platform.

USB dongle types

To learn more about USB we recommend reading this.

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What is a router?

The router is one of the pillars of global communication and most users use their services without even knowing of its existence. They are much more common than we imagine, being present at home, office, in companies of all sizes and internet servers worldwide.

In short, one could say that the router is a device dedicated to the task of managing data traffic flowing through a network of computers. In this article we learn a lot about these essential devices.

What is router

Basically, any common computer can be transformed into a router. Linux is used as the operating system of some brands of routers and there are tutorials on how to transform your simple router into a super machine, just installing and configuring it correctly.

At home, a router can be used to share Internet (cable or ADSL) with other computers, providing firewall protection, control the quality of service and various other tasks, mainly in the field of security.

What is router

A wireless router provides access to the local network and Internet wirelessly to any device, either notebook, tablets or smartphone which is within range of the signal.

Most of wireless routers for home or small business, come with 4 ports for wired local network (LAN) and an Ethernet port to connect the modem Internet (WLAN port). So, simply, internet can be shared with any wireless device within range of the signal and that is configured for that.

What is router

An outstanding feature of some routers is their safety, as it is possible give permission through the physical address of the network, the Media Access Control Address (MAC Address), configure ports access to BitTorrent, Ares, and much more.

If a parent believes that his children should not surf the Internet at dawn, the router has controls to prevent navigation in certain hours. Internet control and network is available to the administrator of the router. And everything is done through a web interface on the device itself.

What is router

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WiMAX, the wireless internet of the future

We talk about Wi-Fi? Well, let’s brush up what it is. Today, the standard for wireless Internet is the Wi-Fi, which is summarized in the following: an antenna array radiates a signal and equipment with this technology that are within the range of antennas Wi-Fi (called “Hot spots”) can connect to wireless Internet, a transfer rate bandwidth (the maximum allowed for that system is 54 Mbps).

Thanks to this feature, in certain parts of the world this technology had extensive development, which led to forming a kind of social movement, with users communities, each with its antenna trying fully cover a sector of a community or neighborhood. Why is it necessary to have several members of a community for this? Because the Wi-Fi antennas have a maximum range of 150 meters, which in practice is reduced to about 90.

What is Wimax

And here is the point of the matter: the new WiMax technology proposes higher speeds (up to 124 Mbps) and, most important, each antenna of this system expands its range of 150 meter to 44 miles. The thing obviously changed. Even more so when you consider that when WiMAX is in full swing, the promise is that the cost of installation of antennas and equipment is lower than the current Wi-Fi.

With the promised range of 50 to 70 kilometers, another panorama opens. Wireless Internet no longer be an exclusively urban attraction (a situation that is unavoidable and necessary to put antennas each 90 meters), on the other hand, Internet could be brought into suburban and rural areas where cable installation is even more difficult by the low number of users. For this reason it is that India is one of the major stakeholders in the WiMAX, to bring broadband (and telephony, and associated services) low cost to more distant areas.

What is Wimax

Some technical details of the WiMAX

  • Name: WiMAX comes from “Worldwide Interoperability for Microwave Access”. The name is the “mask” of the technical definition of the standard 802.16a, a new wireless standard that was approved in 2001 by the WiMAX Forum, which brought together more than 60 companies in the sector.
  • High bandwidth: A base station can simultaneously allow access to more than 60 clients with T1-type connectivity / Y1 https://easytechnow.com/learn-technology/types-internet-connection/or hundreds of homes with DSL connections.
  • Protocol independence: can carry IP, Ethernet, ATM and more.
  • Services added: can transmit Voice over IP (VoIP), data, video, etc.
  • Compatibility: supports phone masts third generation (3G) (called smart antennas) that constantly point to the receiver, although moving.

The future of WiMAX

As mentioned, members of the working group of the IEEE 802.16 standard are investing in the development of portability and mobility. The IEEE 802.16y will fixed correct but also portable and mobile base specification to enable not only the operation. The working groups of the IEEE and IEEE 802.16g 802.16f are responsible for the management interfaces of fixed and mobile operation.

What is Wimax

In this scenario fully in motion, users can move data while accessing broadband or multimedia session streaming. All these features will help make that WiMAX is an even better solution for Internet access in developing countries.

How it works WiMAX?

Internet provider sets up a WiMAX base station to few Km. from your city. To access this service, you just need a computer suitable for WiMAX or to upgrade your current computer to get the necessary support.

Each user will have a special code to obtain access to the station-base. The base station will transmit data from the Internet to your computer (with a current modems that potentially higher speed).

The cost of this service will be much lower than the current high-speed Internet because the provider need not use cables or have facilities to provide service.

In the case of a home network, things would not be very different. The WiMAX base station-send data to a WiMAX router, which send data to computers on your network. You can also combine WiFi and WiMAX by having the router send data to computers via Wi-Fi.

What is Wimax

WiMAX is not only a threat to providers of DSL and cable Internet. The WiMAX protocol is designed to provide different data transmission methods, one of them is the VOIP (Voice Over Internet Protocol).

VOIP allows even international via an Internet connection broadband local calls, long distance and. If the WiMAX service does become a consumer service, using VOIP can increase increasingly. Virtually anyone with a laptop could make VOIP calls.

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Electromagnetic waves from cellular and Wi-Fi equipment affect our health?

Electromagnetic waves provide us with services every day. Invisible and imperceptible, this waves let listen to the radio in the morning, watch TV in the afternoon, and communicate wherever we are, at any time. In short, they allow us to perform multiple actions that have already become everyday and necessary. However, electromagnetic waves generate many concerns.

In June 2008, twenty doctors and oncologists led by the popular David Servan-Schreiber, signed an appeal for vigilance on the use of cell phones. And attracted the interest of the Academy of Medicine, who believes that disturbing to the public opinion in this way “Tends to demagoguery, is not scientific research”.

Electromagnetic waves harm

Some months earlier, in early 2007, some employees from libraries of the City of Paris complained of frequent headaches, they attached to the Wi-Fi points installed in the library to allow visitors provided with a notebook connect to the Internet without wires. As a result of this protest, the City of Paris had to turn off the Wi-Fi service until further notice.

Meanwhile, for several years the mobile phone antennas regularly raise the concern of people living near them, for fear of damage to their health.

The waves harm the organism?

Cell phones and Wi-Fi devices increasingly more frequently are identified as hazardous. What is fear? That the electromagnetic fields of radio frequencies act the human body and interfere with its operation.

For its part, the scientific community shows quiet. It considers that there is no health risk attached to these teams. It has been tested only a single mechanism of interaction of RF with the human body, and is already known: it is used within microwave ovens. In the presence of an electromagnetic high frequency field, such the created by the radio frequency waves, the water molecules present in human tissue are shaken, collide and cause heat. The result: body temperature rises.

Electromagnetic waves harm

But our body is able to regulate the temperature to some extent. That is why defined an indicator: the specific absorption rate (CAS), which reflects the amount of energy absorbed per unit time and per unit mass and is expressed in watts per kilo (W / per kg). From experimental observations, it is set a reference level of 4 W per kg for the whole body. The effects considered undesirable, capable of generating behavioral disorders is given to a very high power, equivalent to a CAS 100 W / kg, i.e. burns.

Legal exposure limits have been calculated from the reference CAS. As a matter of safety, he divided it into 50 for the general public and 10 for workers. In the end, the CAS of a mobile phone and all radio communication device (a cell phone, for example), must be less than 0.08 W / kg for the whole body.

Pending further studies

The above detailed values ​​were proposed by the International Commission on Non-Ionizing Radiation Protection (ICNIRP), and were adopted by the European Union in 1999.

There are other possible effects? A high power for a CAS on the order of 50 W / kg, and long exposures, we observed an incidence of waves in the occurrence of cancer, fertility problems, and a permeability of blood–brain barrier (which filters the blood that irrigates the brain). But so far this has not been shown due to be exposure levels lower than those recommended.

Electromagnetic waves harm

This is all they know current research. Long-term exposure to low-power field, such as a cell phone, can have dire health consequences? The most developed of the current studies is called “Interphone”, and is commanded by the World Health Organization and coordinated by the International Agency for Research on Cancer, which brings together the work of 13 countries.

Their goal: to determine whether the use of mobile phones increases the risk of cancer. To find out, compares the intensity of cell phone use on sick people and healthy people. There is talk of four types of tumors of the head and neck: glioma or brain cancer, acoustic neuroma affecting the auditory nerve, meningioma (a benign tumor) and the tumor of the parotid gland (one of three types of salivary glands)

However, the publication of such studies is postponed long. They argue reason: the possibility of producing a round-up effect in the statistics, which can yield contradictory results.

Intensive use: we must be heedful

For use less than ten years, there seems little likelihood a risk of cancer linked to cell phone. Beyond the ten years of intensive use, still we have very little information to assure. “The development of a tumor is very long, on the order of ten to fifteen”, remembers Francisco Boudin, director of the Health Foundation and radio frequencies. In the event that there are confirmed effects of strong amplitude, current studies have revealed quickly. If there are effects low amplitude, i.e. with a weak probability, we must be vigilant. “For now, do not worry too much”. “Ten years ago we investigate this issue, and so far we have not found a confirmed risk”.

Electromagnetic waves harm

This is reassuring because it indicates that if there is such a risk, “Is weak,” said the specialist. However, nor it can demonstrate that the risk does not exist.

It will increase after twenty or thirty years? This still we do not know. Must be performed new and lengthy studies to know for sure.

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How expand the range of your Wi-Fi router

As we know, the wireless range offered by the router may vary depending on the standard Wi-Fi connection that supports and the obstacles that may interfere between different connection points.

The 802.11n wireless standard, generally offer greater range, but even so it is possible that the signal does not reach all corners of our home or business. In this article, we will learn the way to improve the range of the Wi-Fi signal through a router into disuse.

How to extend WiFi range

The easiest way to get a better Wi-Fi signal throughout our area, it would of course buying all the necessary hardware, including WIFI devices such as repeaters, boosters or extenders, among other devices as wireless access points. With these elements, the task would be so simple that even a 6 year old could do it.

However, if we want to save some money of our budget, we can get it just using an old router and an Ethernet cable.

As an example we can take a building approximately 100 x 200 ft with some walls offering a major obstacle. Even so, we can still have Internet access in most of the facilities.

Achieving extend the range of the signal is very simple. As we know our Wi-Fi signal comes from a wireless router connected to the modem provided by our Internet operator.

How to extend WiFi range

All you have to do is connect a second wireless router Wireless-G to the main router using an Ethernet cable.

Use a second router as an access point

To begin the task, the first thing we have to do is differentiate routers. To do this, we will call “Router1” to the device that are already using the wireless LAN, and “Router2” the second router that will be used to increase the wireless range.

Setting “Router1”

Step 1. First we need to determine the IP address of “Router1”. To do this we must copy and paste the following command “cmd / k ipconfig” in the “Run” command box and write down on paper the value of “Default Gateway”, since that is the IP address of your router.

Let’s assume that the IP address of the router is 192.168.30.1. Importantly, we must also write down on paper the value of the subnet mask, which is usually 255.255.255.0.

How to extend WiFi range

Step 2. We run our favorite browser and enter the IP address “Router1” in the address bar.

At this point we may need to provide a password to access the router configuration. This may vary depending on the manufacturer of the router.

If we are not sure, we can use Google to know it by entering the following query: “router manufacturer default password”

Step 3. Once in the router configuration “Router1” tab, switch to the wireless configuration tab and annotate the wireless mode, SSID and channel.

How to extend WiFi range

In the case we have protected our Wi-Fi network with a password, we must also take note of the security mode (WPA, WEP and WPA2) and password.

Setting “Router2”

Step 4. First we have to reset the router to factory settings by pressing the reset button built into the device for about 10 seconds.

We connect “Router2” to our computer via the Ethernet cable. We plug one end of the cable into any available LAN port on the router and the other end to the Ethernet port on the computer. It is important to check that the router is turned on.

Step 5. Open the browser and enter the following address: 192.168.1.1, which is the IP address of the router default Internet “Router2”.

Once you access the router, you must change the values ​​of the default SSID, wireless mode, channel, security mode and password so they match the router “Router1”.

Then we move to “Settings> Advanced Routing” and change the current mode of “gateway” to “router”. You also need to disable the DHCP server, since “Router1” will handle the task of assigning IP addresses to devices connecting to the wireless network.

How to extend WiFi range

Step 6. Finally, it is also necessary to change the IP address of the router “Router2” any free address in our LAN. For example, if the IP address of the router “Router1” is 192.168.30.1, we assign “Router2” address 192.168.30.2 without any problem.

We must also ensure that the subnet mask is the same as that provided in step 1.

Step 7. Save the settings.

Connecting routers

Now that we have configured both devices, it is time to physically connect them with cables. Chances are that “Router1” offers a 5-port configuration. The WAN port should be connected to the ISP modem provider.

We can now select any of the available ports on the router “Router1” and connect it to any of the LAN ports on the router “Router2” with an Ethernet cable. That simple.

Now that everything is set, we can connect our computer and mobile devices to the second router with a wired connection or Wi-Fi. Note that the remaining three ports are still available.

How to extend WiFi range

As we have assigned the same SSID and security settings for the second router, we should not set any parameters on the laptop while we are close to the emission source.

Moreover, as has just expanded the range of an existing wireless network and not create a new, all shared folders, libraries of music, pictures and other files will be accessible from all computers and mobile devices connected to the home network.

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How Wi-Fi works

There is no doubt that one of the most widespread technologies of recent times, and faster has been adopted to encompass virtually all facets of the user’s life, is known as Wi-Fi, technology that allows us to interconnect different types of devices without wires, avoiding the need for devices fixed in one place. In this article we will learn a little more of this technology to better understand all the advantages that we can offer Wi-Fi.

How WiFi works

Introduction

In a basic explanation, the Wi-Fi wireless links are a connection methodology that allows us to interconnect devices and access the Internet without using cables or complicated configurations, allowing mobility and simplicity of use is unprecedented in the history of computing.

Nowadays, it is almost an obligation that the new devices coming to market offers a connection of this type, which is why we can find Blu-Ray or DVD equipment, and home entertainment such as game consoles, as well as smartphones, tablets or smartphones, in addition to laptops or desktop and many others devices.

The possibility of a wireless connection gives incredible flexibility to these devices for interconnect with other devices, fact that opened the way to other technologies born from this concept as the smart TVs.

How WiFi works

It’s amazing that a simple Internet connection via Wi-Fi can increase the usability even a small media player, adding features and functions unthinkable years ago. Just look at some of the new models come out on the market recently to realize the possibilities it offers.

Technical data

The Wi-Fi technology is based on the IEEE 802.11 standard, however, it does not mean that any product that works with these specifications is Wi-Fi. For a particular product received a seal with this brand, it needs to be assessed and certified by the Wi-Fi Alliance.

This is a way to assure the user that all products with Wi-Fi Certified seal follow the rules of functionality that ensures compatibility with each other. However, that does not mean that devices that do not have the stamp may not work with devices that they do have this seal (but it is preferable to opt for certified products to avoid problems). The base of Wi-Fi is in the 802.11 standard. Here we explain a little more this technology.

How WiFi works

802.11 Standard

The 802.11 specification establishes standards for creating and using wireless networks. The transmission of this network is by radio frequency signals that propagate through the air and can cover areas of hundreds of square meters. As there are countless services that can use radio signals, it is necessary that each operate in accordance with the requirements established by the government of each country. This is a way to avoid problems, especially with interference.

There are, however, some frequency segments that can be used without the direct approval of appropriate each government entities: the bands ISM (Industrial, Scientific and Medical), which can operate, among others, the following intervals:

  • 902 MHz – 928 MHz; 2.4 GHz
  • 2.485 GHz and 5.15 GHz – 5.825 GHz

Notably, depending on the country, these limits may vary. The last two fringe are used by the Wi-Fi, however, this feature may vary according to the version of the 802.11 standard.

It is good to know that, for a network of this type is established, it is necessary that the devices (also called STA – of “station”), they must be connected to devices that provide access.

How WiFi works

These are generically called Access Point (AP). When one or more STA connected to an AP, is obtained a network, which is called a Basic Service Set (BSS). For security and the possibility to be more of a BSS in a certain place (for example, two wireless networks created by different companies in an area event), it is important that each receives an exclusive ID, called Service Set Identifier (SSID), a character set that after defined, is inserted into each data packet network. In other words, the SSID is simply the name given to each wireless network.