The current data communication technology is perhaps the greatest engineering achievement of the 21th century. However, information technology regularly become older and overburdened on the other hand speed of data communication and accordingly cost of the services also varies day by day. For this and various other reasons, transformation or enhancement efforts are underway to make the current electrical era smarter. Now a days everyone wants reliable and secure communication but avoidance of too much hardware condition is also there. A special attention is given to the design of efficient and security proof network architecture capable of managing operation and control of the next generation information technology. For this purpose there are some wireless technologies are emerging in addition to the formerly applied to help upgrade the current data communication trend. In this paper we are introducing wireless technology called Wi-Fi and Li-Fi .This paper also includes the comparison between these technologies. Wireless communication is becoming the standard in the business world. The market for wireless communication has grown rapidly since the introduction of 802.11b wireless local area networking (WLAN) standards. Li-Fi is a new wireless technology to provide the connectivity within localized network environment. There are various applications where we can apply the Li-Fi technology like Aviation, Underwater communication, Controlling traffic signals , Education system and many more. Li- Fi is a fast and cheap optical version of Wi-Fi, which is based on Visible Light Communication (VLC). The source of Li-Fi technology is high brightness LED’s. These LED’s (Light Emitting Diodes) can be switched on and off very quickly which gives you the opportunities for transmitting data at very high speed and also provides flexibility.