4 days ago
All you wanted to know about Wi-Fi Technology
The modern home has broadband, tablets,smart phones,laptops and PC’s.Naturally Wi-Fi has become the new buzzword in connectivity .Not only does the technology let you break away from wires ,but it also allows different users to share an internet connection .What’s more, it has other purpose too.such as the ability to transfer files between devices, wirelessly print documents and more. So if you’re wondering about how you can go wireless at home,readon..
What is Wi-fi
Wi-Fi or wireless-LAN(WLAN) is a popular technology that allows an electronic devices to communicate with each other using a Wi-Fi router as the central hub.Wi-Fi networks can have a range of around 20-25 feet indoors depending on the router used and also the surrounding conditions. In one definition we can say that
“Wi-Fi” is a type of wireless networking protocol that allows devices to communicate without cords or cables.
What does 2.4GHz,5 GH mean ?
Every wireless network uses radio waves to communicate and transmit data.Devices that use radio waves are tuned to a particular frequency .WiFi radios transmit at frequencies of 2.4 GHz or 5 GHz. The 2.4 Ghz sticker that you see on the router means that it transmits data at that frequency. The 5 Ghz sticker that you see on the router means that it transmits data at that frequency. The higher frequency allows the signal to carry more data.However higher the frequency of a wireless signal ,the shorter its range.
Which one is better among 2.4GHz,5 GH
A 5 GHz network can carry more data than a 2.4 GHz network assuming the electric power to the higher frequency radios is maintained at a higher level. As the higher frequency allows the signal to carry more data but at same time higher the frequency of a wireless signal ,the shorter its range.If we overall compare both of them in Network Speed,Network Range,Network Interference and cost we found that 5 GHz hardware offers a few advantages over 2.4 GHz hardware, but in practice, 2.4 GHz is usually the better choice for home and other wireless local networks. So-called dual band hardware combines the best of both types of hardware by integrating both types of radios into the product.
What does Wi-fi a/b/g/n mean
a/b/g/n refers to the speeds/networks that you can connect to. 802.11a is limited to 2 Mbps 802.11b is limited to 11Mbps 802.11g is limited to 54Mbps 802.11n is limited to 108Mbps Although Wi-Fi standards “a” and “b” are nearly non -existence as both of these standards provide very low bandwidth to transfer data,making them impractical to use in today’s fast word. Wi-Fi standard “g” attempts to combine the best of both 802.11a and 802.11b.It uses the 2.4 GHz frequency to transmit data.It is also the most common standard to use currentl.It supports bandwidth up to 54 Mbps and more tolerant to signal interference than the previous standards.
Pros of 802.11g – fast maximum speed; signal range is good and not easily obstructed.
Cons of 802.11g – costs more than 802.11b; appliances may interfere on the unregulated signal frequency
Wi-Fi standard “n” newest IEEE standard in the Wi-Fi category that features a much higher theoretical speed of 300 Mbps.It provides better signal strength due to improved signal intensity,but is more prone to signal interference.
Pros of 802.11n – fastest maximum speed and best signal range; more resistant to signal interference from outside sources.
Cons of 802.11n – some standard is not yet finalized; or we can say still in the costs more than 802.11g; the use of multiple signals may greatly interfere with nearby 802.11b/g based networks.
The 802.11n standard uses some new technology and tweaks existing technologies to give Wi-Fi more speed and range.
Types of routers
There are manly three kinds of routers
- Single band
- Dual band
- Simultaneous band
Routers that operate only in the 2.4GHz band are referred to as”single band” Dual band routers support both bands(2.4GHz and 5GHz),but can work with only one band at a time. Simultaneous dual -band routers can work with both bands at the same time,thus providing for more flexible and speed.
What are ADSL/DSL + Wifi routers
Digital Subscriber Line (DSL) is a generic term categorizing services provided over copper wire.On the other hand ADSL (asymmetric digital subscriber line) is a type of DSL broadband communications technology used for connecting to the Internet. ADSL or DSL technology is used to provide broadband connections to many households.ADSL is a specific type of service sold to allow subscribers to connect to high speed data networks.
What about the all-important issues of security
Almost all of us have jumped onto someone else’s unsecured Wi-Fi network. any folks setting up wireless home networks rush through the job to get their Internet connectivity working as quickly as possible. That’s totally understandable. It’s also quite risky as numerous security problems can result. If left unprotected ,your Wi-Fi connection can allow your neighbors to use your broadband for free,even without your knowledge.Most of the security tips one can offer about wireless networking are the sort of thing someone might call “common sense”. Some common and simple effective ways to protect your wireless are like
- Use a strong password : Use strong password as using a sufficiently weak password, on the other hand, almost guarantees that your system will be compromised at some point.
- Don’t broadcast your SSID : A simple and effective way of protecting a Wi-Fi network is by hiding its name,know as SSID(Server Set identifier) that is the router will not show up when someone seeks a connection.
- Restrict access by MAC address
- Shut down the network when it’s not being used. Shut down your wireless network interface, too.
- You should always make sure you have an eye on what’s going on, that you are tracking attack trends. The more you know about what malicious security crackers are trying to do to your network, the better the job of defending against them you can do.
- Make sure you have some kind of good firewall running, Whether on a wireless router or on a laptop you use to Connect to wireless networks away from home.
- Use good wireless encryption : WEP, WPA,WPA2 are the current, common encryption standard you should probably be using .Of these WPA2(Wi-Fi protected Access 2) is the most advanced ,secure and common protocol out there,and is mandatory on all routers after 2005.
The WPA2 -enterprise mode has advanced security standards and is not really recommended for home or small office use.All of your Wi-Fi client devices (laptops, handsets, and other Wi-Fi enabled products) should use WPA2.Look for a router that supports the hybrid WPA + WPA2 mode, which lets you use the stronger WPA2 encryption with adapters that support it, while still maintaining compatibility with WPA adapters.