ADSL & WI-FI are the two emerging terms in the field of data communication networks and they are the two devices used for faster and error free data transmission through networks. They have distinguished features and are used in different domains but lead to a common purpose of speedy data transmission.

ADSL or also known as asymmetric digital subscriber line is a form of DSL, a data communication technology that enables faster data transmission over copper telephone lines than a conventional voice band modem can provide. It does this by utilizing frequencies that are not used by a voice telephone call. It consists of a splitter and micro filter who do the task of splitting frequencies at different levels and filtering them , removing the one’s which are not required and keeping the required one’s.

WI-FI, also a synonym for wireless LAN is the technology used for wireless transmission of data at unbelievable speed. This saves the cost of expensive set-up required and only needs a few input & output devices to enable it at both, transmitting & receiving sides.

The distinguishing characteristic of ADSL over other forms of c is that the volume of data flow is greater in one direction than the other, i.e. it is asymmetric. Providers usually install ADSL as a service for consumers to connect to the Internet in a relatively passive mode, i.e. able to use the higher speed direction for the “download” from the Internet but not needing to run servers that would require high speed in the other direction. It can be said as a one sided device. This is basically done to prevent crosstalk and to achieve higher levels of full duplexing. However Wi-Fi is completely wireless, two dimensional data transfer device, which helps in transferring data in a half-duplex mode. Wi-Fi allows local area networks (LANs) to be deployed without wires for client devices, typically reducing the costs of network deployment and expansion. Spaces where cables cannot be run, such as outdoor areas and historical buildings, can host wireless LAN adapters and chipsets.

These devices are low on maintenance and high on working and so they are deployed all over to do the desired task at a higher rate which saves much of time and resources. They reach up to the limits of 135m indoors and 95 m outdoors and provide data transfer limit up to a few Mbps or Gbps which make them a favorable choice.