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"Another way of having a Remote Lab for Demo Testing "
Installing VMware ESXi Arm Fling on a Raspberry PI 4 - I used this as a mobile lab with my Microsoft Surface Pro with VMware Workstation 16 installed to manage a Virtual Firewall Appliance & Domain Controller VM's to support & manage access to the ESXi Arm Fling Host where Linux and Windows VM's that are configured. I also carry a 5 port switch with 2 3ft CAT6 cables with me for connectivity for all devices.
This is a great setup if you have limited funds and space to purchase Homelab for testing.
Credit to William Lam (VMware) for a great How To article.