Learn how to change the Subnet Mask in Windows 11/10 using Settings, Control Panel, PowerShell and your browser. Subnet Mask divides IP address into two segments.

Different subnet masks in general. Company A may be pretty straightforward and have subnet masks of 255.255.255.0.

Because device 2's IP/Subnet mask put it on a different network then it's default gateway, so the traffic isn't ever reaching the router. 192.168.2.0/23 is 192.168.2.0-192.168.3.255. It doesn't ...