The antenna creates an interesting gain that will hook the wifi network more easily if you know the difficulties of wifi reception, the extension allows to put the antenna outside on the PC and reduce the risk of accidental hooking of the key, the fact the key is outside the PC can cut the PC in case of significant network attack (which does not happen in the film) and allow you to leave the network to write a document you stand to keep secret (hackers can overcome the defense if it were not material) does not then keep the document on the PC. Example, you write a book, you remove the add + wifi usb key instead on which you will save your work, it will prevent you from seeing the other side of the world a person publish your work as his own .. . made do not blindly trust your firewall, antivirus or wifi deactivation system, nothing can replace the fact materially equip the wifi device, preventing any communication through this act of the PC with the internet.
