(CiscoPacketTracer7.064-bit official version, when you open it, you will be prompted to register a Cisco account. After registration, you will not be prompted when you open it again. The function is much more powerful than the 6.2 version, and there are many more devices that can be added. When you open it, you will be prompted You have registered an account with Cisco Network Academy. If you don’t want to pop up the box every time, you can register an account, so that you will not be prompted to register every time you open it in the future.)