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What does a subnet mask mean? What exactly does 255.255.255.0 manage? I only figured it out when I couldn't connect to the printer at work
subnet mask is the string 255.255.255.0 next to the IP address, which determines which devices are counted in the same cell: within the same cell, you can directly call out and cross the gateway. I filled out the mask at a friend's company, and half of the office's shared printers couldn't connect. I spent the whole afternoon figuring out the account. ...
