Hi Apex,
The ip address is a basic gateway to access internet so computer manufacturers allocate separate ip address for each and every system. The router is an additional device to access effective internet service. The private ip address like 192.168.1.1 ip address used to different security purposes. The accessing private ip address is so simple but method of using ip address can be varied as per version of operating system. Normally windows, Unix, linux, mac os and ios and other versions can access private ip address but users should follow lot instructions to avoid more significant problems. As per router default gateway ip address can be changed so users have to verify address with manual.
All the best
Masha