Image files often contain some unnecessary information (such as comments, EXIF tags, color profile, etc.). The image quality does not have any change after removing them, yet this can achieve the purpose of 'weight loss' to image file. And finally that will improve the image loading speed and take up less disk storage space.

Most modern routers allow you to backup/export its full configuration, and restore them from this file when you need. The router configuration file (like TP-LINK's config.bin, it varies according to the brand and model of router) usually contains info including your ISP username/password, router's login password, wireless network password, etc. RouterPassView enables us to get a sweeping view of all this.

At present, there are 3 giant compression software: the commercial WinRAR, free and open-source 7-Zip & FreeArc (we had said goodbye to the old WinZip many years ago). And today's leading role is FreeArc for Windows and Linux, from Russia.

Ghost (short for General Hardware-Oriented System Transfer) is an excellent backup & restore tool (commonly known as cloning software) for system, data on hard disk/partition developed by the famous Symantec company from America. For the vast majority of advanced users like system administrator/network manager, it is used to backup the system partition (so as to minimize the time and labor spent on each reinstallation of OS furthest) or data on a disk.

Without any doubt, Wireshark (formerly called Ethereal) is currently the world's most famous, foremost free and open source network packets capture & analysis tool. Its appearance puts an end to the future of all similar business software.