You cannot use the first address (Network ID) or the last address (Broadcast Address) in any range for a specific host. Levels 4–6: Introducing Routers Now you have a router connecting multiple subnets.
The mask (e.g., 255.255.255.0 or /24 ) defines which part of the IP is the "street" (Network ID) and which is the "house" (Host ID). netpractice 42 tutorial
Routers connect different networks. If a device wants to send data outside its own "street," it must send it to the Default Gateway (the router’s IP). You cannot use the first address (Network ID)
This tutorial breaks down the essential concepts and provides a roadmap for the common hurdles you'll face. Core Concepts: The Toolbox Routers connect different networks
For a host to reach another network, its routing table must list the router’s local interface as the Next Hop . Levels 7–10: Advanced Routing & Public vs. Private IPs
Before diving into the levels, you must master these four pillars:
A router interface must have an IP address that belongs to the subnet it is connected to.