Virtual network modes define how guest VMs connect to the host and external networks in hypervisor environments. NAT routes VM traffic through the host, Bridged makes VMs appear as separate devices on the physical network, Host-only creates a private network between host and VMs, and Internal isolates communication to VMs only. Host-only mode is the preferred configuration for secure, isolated penetration testing labs. Fork this diagram on Diagrams.so to customize network isolation strategies for your security testing infrastructure.