拿到一个软件，侦测它的壳,然后我们要把它的壳脱去,还原它的本来面目.若它没有加壳,就省事不用脱壳了-Get a software that detects its shell, shell then we want it to take off, restore the true nature of it. If it doesn t add a shell, save trouble without shells

Against ARP spoofing. When somebody are trying to make you off in LAN ....you can protect yourself with that. Just respect instructions