15.11.4 How Does A Router Know Where To Send A Packet?
Explains how routers examine destination IP addresses, consult routing tables, determine the next hop, and forward packets toward their destination across many interconnected networks.
- What Is a Router?
- Why Can't Ethernet Switches Perform This Job?
- What Is Inside an IP Packet?
- What Is a Routing Table?
- What Is the "Next Hop"?
- Does the Router Change the Packet?
- How Does the Router Find the Correct Local Device?
- How Do Routers Learn Routes?
- Is the Shortest Route Always Chosen?
- What Happens If a Router Fails?
- How Many Routers Does a Packet Usually Cross?
- Why Is Routing Such an Elegant Solution?
- What Should You Remember?