I hope you are ready for the magnitude of the amount of information that WANs are made up of. Cisco supports numerous types of WAN designs, which means the hardware, protocols and topologies that can get created, would fill up a whole library.
We are going to focus on some of the basics of WAN technologies and protocols that you will encounter in the CCNA certification but also in real-world scenarios. We will discuss the different types of connection options that a WAN can create. In LAN, you were pretty much in control and if you needed to add other links to connect to new offices, it was as easy as running wire through your infrastructure and making sure the cables were properly created and terminated. Connectivity would not be an issue and you would simply create the IP scheme. Wide Area Networks are not so simple. If you are a company that has branch offices...
