(Replacing desktop computers with notebooks is an indisputable reality. One of the most important functions of the notebook is that it can support Wi-Fi wireless Internet access, no matter the high-end Centrino 2 or the low-end netbooks are 100uilt-in wireless network cards. At the same time, wireless routers are no longer expensive, and the cheap ones only cost more than 100 yuan. It can be said that the threshold for wireless Internet access has been greatly reduced.)