Due to the growing popularity of high-speed internet connections. Wi-Fi, the easiest way to enable several computers to share the same broadband link, was developed years ago. This fast method of wireless data ＿＿（16）＿＿ has made the flow of large amounts of information easily available and can be conveniently ＿＿（17）＿＿ with no waiting. Due to all the rapid changes in science and technology, it may, however, be replaced in the ＿＿（18）＿＿ future by an even faster technology called Li-Fi. In 2011, Professor Harold Hass at the University of Edinburgh introduced Light Fidelity (Li-Fi) to the public. This advanced technology, which supports multiuser access and enables roaming, uses visible light to transport data. Its lightning speed, which is 100 times faster than the average Wi-Fi, can transfer one gigabyte per second. That is, music, or even movies can be downloaded in just seconds. In addition to its ＿＿（19）＿＿ speed, the security of Li-Fi is better than Wi-Fi, which is ＿＿（20）＿＿ for aircrafts or hospitals where high security is expected. Li-Fi will no doubt change the way we use and send data.