Exam Essentials
Understand the basic IP routing process. You need to remember that the frame changes at each hop but that the packet is never changed or manipulated in any way until it reaches the destination device.
Understand that MAC addresses are always local. A MAC (hardware) address will only be used on a local LAN. It will never pass a router’s interface.
Understand that a frame carries a packet to only two places. A frame uses MAC (hardware) addresses to send a packet on a LAN. The frame will take the packet to either a host on the LAN or a router’s interface if the packet is destined for a remote network.
Remember the difference between static and dynamic routing. Static routing is where you, as the administrator, by hand, add every route into every routing table on every router on the network. This is as much work as it sounds like, which is why we use dynamic routing protocols that do the work for us. Of course, we’ll discuss dynamic routing protocols more...
