Which statement about changing a VM's network connection is NOT correct?

Changing a VM’s network connection typically allows for flexibility in managing network configurations. When you want to change a virtual machine's network settings, such as connecting to a different virtual switch or adjusting its connection type, several scenarios allow for these changes while the VM is still powered on.

The assertion that a VM needs to be powered off to change its network switch is not accurate. Many virtualization platforms, including VMware and Hyper-V, support live migration of network connections, permitting adjustments to a VM's network settings without disrupting its operations. This capability enhances overall efficiency, as it allows administrators to make necessary changes without downtime.

In contrast, the other statements highlight valid aspects regarding VM network connections. A virtual machine can change its network settings while running, and a virtual switch can be swapped as needed, reflecting the flexibility of virtualized environments. Hence, the incorrect assertion pertains to the misconception that power-off is mandatory for switching network connections.