The Subnet ID is used by routers to determine the best route between subnetworks. In the example provided, the subnet ID is identified within a larger network address.
According to the reference, consider the 172.16.0.0 network. In this network, the third grouping of numbers represents the Subnet ID. Figure 3 in the reference shows that four of the possible 256 subnets are connected to a single router.
In simpler terms:
- The Subnet ID helps routers find the right path to a specific subnetwork.
- Example: In the 172.16.0.0 network, the "0" in the third position (172.16.0.0) indicates the specific subnet.
