1.22DESTINATION ADDRESS.THESE TWO ADDRESSES ARE STORED IN THE PACKET...

2.1.22destination address.These two addresses are stored in the packet’s header information.That3means that any device on the network that receives this packet can inspect the header tofind out where the packet came from and where it’s going. If we provide our device with alittle more information, such as details concerning the network’s design and implementa-tion, that device can also change the routing for the packet in an intelligent manner to helplower the total cost of the traffic.So that we’re all on the same page, we need to start by reviewing the basics of routing.Keep in mind as we go through the following material that it is mainly review and notintended as the final word on these topics.

Reviewing Routing Basics

Understanding the concepts concerning IP addressing is critical to understanding how IProuting works. A good understanding of IP addressing, and subsequently the art of subnet-ting, requires that you be comfortable with binary notation and math.You already know that an IP address is a numeric identifier assigned to everymachine on a network.This address tells where the device is located on the specific net-work.

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ARNINGKeep in mind that an IP address is a software address. Don’t confuse it with ahardware address. The hardware address is hard-coded into the machine itself orin the network interface card (NIC). Also keep in mind that starting with Windows