Here, In the network every host machine has an IP address,there is as part of address which is common to all and host addresses are in a range so we can identify LAN as a SUBNET. the host machine which is connected to multiple subnets is called router and it will have atleast one IP address per subnet. Here, router connected to LAN and the internet and have local address w.r.t to subnet and uplink address to connect with the internet.
The subnet is defined in two pieces,network pieces and subnet mask,according to the CIDR notation ,subnet address is represented as network prefix/subnet mask . So here, 10.23.2.0 is the network prefix which is common to all host addresses in the subnet and /24 is the subnet mask.
