WAN Terminology
Now that you have a working scenario with r1 to r6, I want to discuss WAN concerns and terminology a bit more. The Telecommunications Act of 1996 drastically changed the way of the WAN. However, there are still three main concerns when connecting your sites:
Availability
Bandwidth
Cost
Whether you select leased lines, circuit-switched networks, packet-switched networks, cell-switched networks, Digital Subscriber Lines (DSL), cable modems, or wireless, you must interface with the provider(s). Interfacing with the provider is a big part of supporting the WAN. The central office (CO) is the entry point of the cloud for calling devices and the exit point of the cloud for called devices. It is the switching point for calls that traverse ...
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