modem

What is a Wi-Fi router?

Most likely is that more than once we have observed with the corner of his eye that little box that is close to our PC, whose lights constantly blink to creating the magic that allows us to enjoy internet throughout the house wirelessly via a Wi Fi connection. That box, as we all know is a router. Except that most do not really know what function fulfills this device.

Basically, a router is a device used to distribute Internet signal among all local computers networked either via Ethernet through a cable, or by means of technology of Wi-Fi radio waves, causing the network is characterized by being wireless.

What is Wi-Fi router

By and large, both types of networks have advantages and disadvantages, but the fact is that most users often opt for wireless networks, mainly because they tend to be less expensive and easier to configure because it does not require tedious cable connections between the PCs and the router.

Of course, to use the Internet on computers that are part of the wireless network, the router also will require a modem. Through the modem, the Internet signal is received, so the wireless router must be connected to the modem to provide Internet access to the entire network.

However, it notes that in the current market there are also wireless routers have a built-in modem, which can be an excellent choice if we want to reduce the number of devices.

What is Wi-Fi router

In this regard, to make a good choice, before choosing a wireless router with built-in modem, we must know exactly the kind of Internet access that we have, if is cable type or if it is a DSL connection, because they are different technologies, and each works differently, and based on this data, choose the correct type of modem.

Another important point to note, as we mentioned above, is that the wireless routers operate using radio waves, which propagate in a circular pattern, i.e. start from the router and spread by the outside thereof. That is why it becomes important fact to take into account the signal strength and speed that can reach the device, because the stronger the signal, the better the connection.

What is Wi-Fi router

Neither we must forget that for this process to work, each desktop PCs, laptops and devices generally must have their own wireless Wi-Fi card inside, and if not we add an external portable device Wi- Fi that supports the same protocol as your wireless router.

What is a wireless USB Router?

When speaking of USB router, this term refers to devices that are used to share an Internet connection among multiple computers broadband, and are primarily designed to be used when a computer does not have an available Ethernet connection.

But the term “router USB” is also often used to refer to a device that connects to a PC that is connected to the Internet and share the connection with other machines wirelessly. This type of connection is known as an ad-hoc connection.

What is Wi-Fi router

Importantly, this type of configuration that requires an ad-hoc connection is much less flexible than the traditional with router, since it needs that the main computer is always on and connected to the Internet at all times to make the network work, because when the main computer is off, the other machines cannot access the connection.

If you liked this page, you can share…

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.

The types of Internet connection

Internet is part of everyday life of many people. It is a source of research for some, or leisure and work for others. The vast computer network expands at high speed, and it is impossible try to stop it. Such is the utility that is able to lend, which since the 60s, date of creation of Internet, until today, have developed various ways to connect to it through multiple media, trying each time to improve its performance and ease access, to bring it to mass audiences.

Nevertheless, this diversity of access methods Internet also brings with it still coexist many ways to access to Internet, many of which have been forgotten and unused for having been overtaken in terms of speed and capacity. This obviously lends itself to confusion, and that is why this article will find everything you need to understand which are the connection possibilities, how works each of the connections, and what are their main advantages and disadvantages.

Types of internet connections

Telephone line connection

Also called dial-up, is the oldest method of connection and was the only used when the Internet was in its infancy. Access is made by the user via a modem and telephone line. This type of connection is used less and less, since the data transmission capacity does not exceed 56 kbps, which makes navigation very slow. With the popularization of services of broadband access with affordable prices, the dial-up access is virtually extinct.

Besides of the low speed operation, dial-up connection is not stable and keeps busy telephone line when connected to the Internet. That is, or surfing the internet or talking on the phone. Regardless of the time at which you access the Internet, the telephone bill costs may increase considerably.

Types of internet connections

On the other hand, it is the simplest connection. It only takes one phone line available, a PC with modem, and an ISP free or payment. In the case of paid access, they offer different plans with limits of hours of navigation and access to limited or unlimited data. We must remember that the quality and stability of free access providers may be less than payment providers.

xDSL connection

The xDSL connection is provided through the conventional telephone network, but it is different to dial-up access. A modem converts this information into an electrical signal and separates it into a different frequency than that used by the voice, thus the data signal does not interfere with telephone use. This means that you can surf the Internet and use the phone at the same time. However, it is good to remember that it is necessary that the PC have an Ethernet network board.

The xDSL service operates by hiring an access provider, like dial-up, and you can access services with different speeds. For example, in the ADSL, the speed varies from 256 kbps to 8 Mbps; in ADSL2 or ADSL2 + ranging from 256 kbps up to 24 Mbps; in the VDSL you can reach a speed of 52 Mbps and up to 100 Mbps VDSL2. Despite the popularity of this type of access is not available everywhere.

Types of internet connections

The xDLS has the disadvantage that it is a shared service, navigation can be slower at peak times when many users use the service simultaneously.

Cable TV connection

The cable connection is increasingly popular and uses the same infrastructure as the service cable TV, which facilitates installation. Many cable television services offers in the package access to Internet with different speeds. In this case, data from the Internet and cable TV are transmitted through a single cable, then the signals are separated by a device called a splitter. From there we took a cable for TV and the other for Internet.

One of the advantages of this type of connection is that just simply connect the cable modem to the computer to be connected without the need to dial or activate a service. Please note that for this function, the PC Ethernet network card must be installed. Obviously, this type of access is possible only in regions where there are cable television services.

Types of internet connections

This type of access is available in different types of speeds. Browsing speed, and limit downloads and uploads data, depend exclusively on the package we have hired. Moreover, the speed is not affected by the number of users or the time of the day when the service is used. Unlike the xDSL access, the user will always have the same speed access at any time.

Satellite connection

Another alternative is satellite connection, for which specific teams that usually have a very high cost are required. You must purchase an antenna able to capture the satellite signal and transmit it to the computer with an internal or external modem receiver. In some cases, the antenna is provided by the service provider itself. This type of internet access, has plans that offer speeds ranging from 512 kbs to 2 Mbps.

Types of internet connections

One advantage of the satellite connection is that access is not dependent on the location. This way you will have access to internet anywhere where coverage comes. However, the more remote the place where we are, the stronger the signal.

Radio connection (Wireless)

Internet access radio is a way to extend a broadband connection somewhere where there are no service. That point can be anything from a small restricted area, such as an office, to a complete city. For that you need to configure a wireless network. Included in this mode, the Wi-Fi and Wi-Max.

One of the advantages of the radio connection is the possibility of sharing access and ensuring mobility to users. The basic infrastructure requires a delivery point internet service, which can be a wired, xDSL or satellite, modem compatible with the service, an Access Point (kind of radio) and computers with receiver or wireless network adapter for pick up the signal.

Types of internet connections

When sharing a high-capacity connection, users can split the costs, while the service guarantees a permanent and low cost of installation and maintenance connection. However, the simultaneous use for downloads may impair access.

Mobile telephone connections via 3G and 4G connections

The internet through cell phones is getting better. The arrival of 3G internet connection provided broadband cell phones with a previously unimaginable speed. However, the best, at least until today, is the appearance on the market of the 4G standard, which can receive and send data at speeds impossible to reach previously , giving us the ability to watch videos in HD quality listen to music directly from the cloud, among others.

Types of internet connections

Mobility is a major advantage of such services. For GSM networks, the transfer rate can reach 800 kbps. In the case of CDMA networks, the transfer can reach speeds up to 2 Mbps.

These numbers are largely superseded when our phone is compatible with 3G or 4G, which can far exceed these figures, reaching in the case of 3G to 2 Mbps, and in the case of 4G to 200 Mbps.

PLC (Power Line Communications)

Undoubtedly, the PLC technology (Power Line Communications) is one of the most interesting forms of connection that are mentioned in this article, because it uses power lines to transmit data at high speed.

Types of internet connections

Today is one of the alternative connection systems most used by users worldwide, as among many of the benefits it offers, is the possibility of using the electrical wiring in any home for exchanging data between nodes on a local network, with the convenience of not having to invest in the many meters of network cable necessary to mount it, something that appreciate many homes and small businesses.

Now it only remains to choose the connection mode to access the Internet and enjoy.

Input and Output Peripherals

The I/O (input and output) peripheral are used primarily for communication between the computer and the external environment. They provide the ability to enter commands to the PC, and vice versa, i.e. send commands to outside to perform some task on a given device.

In addition, they also have the peculiarity of manage their own transfer rates, without the computer having to deal with the balance of the transmission speed. Among these components we can mention keyboard, monitor and printer.

Computer peripherals

CD/DVD Drive (Input and Output): Its function is to rotate an optical disk at a constant speed to transfer programs or data from this disk to the computer or vice versa. This operation is performed through a recording and reading head which moves back and forth on the disc surface. The data recorded on the disc can be read and used as a reference in a future operations.

Computer peripherals

Hard Disk or HD (Input and Output): This types of storage units are characterized by greater storage capacity and faster operation.

It consists of a series of discs of rigid material, grouped in a single axis, each disc having a head. The heads float on the surface of the disc supported on a cushion of air, which means they must be kept in sealed boxes to avoid problems caused by dust and other foreign matter.

Computer peripherals

Monitor (output device): This is the device that is used to allow the user to view the data and graphics elements needed to perform its task. Without the monitor, it would be virtually impossible to operate a computer. This screen is connected to the computer through the port of the video card.

Computer peripherals

Mouse (input device): The mouse is placed on any flat surface, and when it moves, it also moves the cursor on the screen with extreme agility. Thus, the user can move to any part of the screen, press the button and select the desired operation and perform all possible actions.

Computer peripherals

Joystick (Input device): The joystick has the particularity of being able to move in many directions and axles, smoothly and a very agile way, which makes especially useful for all sorts of games and other implementations. This device is moved similarly to the mouse, ie, the movements the user makes with the joystick are repeated on the screen.

Computer peripherals

Printer (Output device): This peripherical is used to print data on paper. Currently, there are three main types of printers: dot matrix, ink jet and laser.

Computer peripherals

Modem (Input and output): The modem is a signal conversion device, which is capable of transmitting data over phone lines. The MODEM term is derived from the MOdulation and DEModulation words. Used for internet connection.

Computer peripherals

Keyboard (input device): The most important means of data entry, which establishes a direct relationship between the user and the computer.

Computer peripherals

Scanner (Input device): An image scanner is an input device that allows scan pages or pictures from printed material such as magazines, newspapers and posters, and convert them to digital data so they can be used by programs such as Photoshop, OCR applications and other software designed to work with images.

Computer peripherals

Scanned images can be modified and reproduced again by suitable printing equipment. In this way we can make posters or any other type of work using photographs.