QEMU Question:

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QEMU runs on user mode network that is being setup between host and guest operating systems. QEMU provides the emulation to manage the network interface internally and for the application as well. It provides a way to manage DHCP host IPs that assigns the IP dynamically to the guest OS. The protocols that are used to be redirected from host to guest OS is done by TCP and UDP. TCP and UDP are the only connections that are present by default. To setup TAP networking, first the connection with the guest OS has to be established by using Ethernet connection connected to the host OS that is using TAP network bridge. The script that is called by qemu for network configuration is /etc/qemu-ifup script, this script sets up the bridge network.