Why does Ubuntu resolve hostname but Win-10 does not?

I am pinging a network device with the syntax:

UBUNTU>> ping myHost

Ubuntu is able to resolve the hostname (myHost) to the correct LAN IP (192.168.XX.YY), whereas Win-10 is unable to do this unless a period is appended to myHost:

"Ping request could not find host myHost"

1) Is it unreasonable to expect myHost (sans period) to resolve on Win-10?

2) Why does Win-10 require the period appended to myHost? Why is the period required on Win-10?

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