Friday, October 11, 2013
The Wi-Fi has its own set of advantages and limitations.
Advantages of WiFi
- WiFi makes the deployment of local Area Networks or LANs quite cheap.
- There are some areas where the cables cannot be installed such as in historical buildings and outdoor areas.
- But these spaces do not have any problem in hosting a wireless LAN.
- Wireless Network adapters are being built into almost all the laptops by the manufacturers.
- A basic level of service is provided at which different brands concerning and client network interfaces access points that are competing with each other can inter-operate.
- The products that have been certified by Wi-Fi alliance show back word compatibility.
- A standard device for WiFi will work at any place in the whole world unlike our phones.
- The WPA2 or the WiFi protected access encryption is secure provided a condition that the pass phrase used is quite strong.
- The new protocols use for WMM i.e., Quality of service increase the suitability of the Wi-Fi regarding its use in latency - sensitive applications.
- WMM is a power saving mechanism that is used for extending the life of the battery.
Limitations of WiFi
- Inconsistency of the operation and spectrum assignments poses a problem worldwide.
- The range all the WiFi networks is limited.
- A wireless access point typically uses a stock antenna having a range of 100 m outdoors and 25m indoors.
- The frequency band is a major factor for producing variations in the range.
- The range of Wi-Fi with a 2.4 ghz frequency block is better when compared with the 5.0 ghz frequency block Wi-Fi.
- Some wireless routers come with detachable antennas.
- These antennas can be removed for improving the range.
- In their place upgraded antennas can be fitted.
- The benefit of these antennas is that they have high directional gain at the remote devices.
- The local regulations limit the maximum amount of power that can be transmitted by a Wi-Fi.
- The power consumption of Wi-Fi is quite higher than the other standards.
- This is so because of the reach requirements of the wireless LAN applications.
- There are technologies available that provide a propagation range that is much shorter.
- One such technology is Bluetooth and has very low power consumption.
- Other technologies such as zigbee have low power consumption, a long range but provides low data rate.
- The most commonly used wireless encryption standard is WEP or wired equivalent privacy.
- Even this standard has been proven to be breakable even if correct configuration is used.
- This problem was addressed by WPA or Wi-Fi protected access standard to some extent.
- By default the wireless access points use the encryption free mode.
- The wireless security is disabled because of which the LAN can be openly accessed.