VMWare Workstation 16.1.1 on Windows 10 Professional host. Created 4 guest machines, each a trial version of Windows Server 2016 standard edition.
On 2 of the machines I was unable to ping the other 3 machines. I could ping google.com from the 2 problem machines.
Using static IP addresses 192.168.64.151 to 154 Problem machines IP address .151 and .154 Added hostname entries to each of guest machines in windows\system32\drivers\etc\hosts file
The Windows firewall was enabled by default on the 4 guest machines.
Restarting the guest machines did not fix the problem.