8.A service provider divide a subnet into a routing prefix

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.

Internet Service Providers (ISPs) may divide a larger address block into smaller subnets by creating a routing prefix and a network ID. This allows them to organize and route traffic more efficiently. From a user’s perspective, this division is generally invisible, as users typically receive a predefined subnet and do not control routing decisions beyond their local network.