i`ve install mikrotik in virtual machine.
How can we have two network cards?
One for internal network.
One for external network. (System that is installed on the virtual machine, is connected to the Internet.)


What are the options? (for connect internal network to Virtual Network Card (Local) AND connect external network to Internet (in my system))
1- Virtual Network Card in system?
2- Virtual Network Card in virtual machine?
3- Type of network Connection in virtual machine? (mean NAT, Host, Bridge,...)

In this case it is necessary to create the network interace the virtual machine you are using (VMware, VirtualBox, etc.). Created interfaces to configure the virtual machine as a bridge to get the internet access of the host (real machine) and the other as inet or local network to create an internal network.

No doubt post more details.