Why can't hosts on the local network see each other?

Question

Network administration

Home network controlled by a router. It is necessary that network clients see each other.
the arp -a command gives only the ip of the host and the ip of the router.
Thanks in advance!

Answer 1

Computers with original Win7 and 10 with default settings on a home network with a router and DHCP on the router see each other in a networked environment.
Deal with Tweaks of Windows builds, Firewalls, Antiviruses, Internet Security and other similar things that you have installed.