I’m concerned about the security of my home network and want to ensure that all devices connected to my router are visible in the administration page. I’ve been monitoring the router page, which I access by typing 192.168.1.1 in my browser, but I have a feeling that there might be a device connected that I’m not seeing.

I have a few questions regarding this:

Is it possible for devices to connect to my router without appearing on the list of connected devices in the administration page?
Do the IP addresses assigned to devices on the router need to be sequential (e.g., 192.168.1.2, 192.168.1.3) or can they vary (e.g., 192.168.1.2, 192.168.1.16)?
I want to ensure that my network is secure and that I have visibility into all connected devices. Are there any additional security measures I can take to address my concerns?

Thank you.