8.Why might a service provider further divide a subnet into a routing prefix and another network ID, and how does this differ from the perspective of an average user?
For an average user, the network consists of 2 things: the subnet and the interface id whereas a network provider further divides a subnet into routing prefix and another network ID as the ISP needs to configure it according to the host addresses available during that time.
For the average user, the network is typically seen as a combination of the subnet and the interface ID. In contrast, a network provider may further divide a subnet into a routing prefix and another network ID. This division is necessary for the service provider to allocate and manage address space efficiently, configuring it based on the available host addresses at any given time.