What is 192 in 192.168.0.1IPA?

Answer 1

The 192 is the decimal representation of the first 8 bits of the IPv4 address given.

In dot notation IPv4 addresses are given as four decimal numbers in the range 0-255 (each representing 8 bits of the 32 bits of the address) separated by dots.

192.168 together provide the first 16 bits of a class C non-routeable private ip address - any addresses starting 192.168. are not routed across the internet but are intended for local nets; if access to the internet is required, they go via a gateway machine (with one NIC (Network Interface Card) on the local net and a second one on the internet) that provides Network Address Translation.