KVM network & DHCP

I am very inexperienced with KVM and have a question about networking As per my basic understanding a network in KVM apparently also provides the work of an DHCP server for all machines on that network. So, whether that perception is correct, how would you go about whether you wanted (for learning purposes) to use a particular VM on such a KVM (internal) network to act as the DHCP server for all machines on that network? by default it should conflict with the built in DHCP service of the network itself, wouldn't it?