Conclusion
Most of the more widely used WAN protocols have been covered in this chapter. Each protocol was covered in enough depth to get a circuit connected to your router and routing traffic. There are other options available for each interface type. Some options are specific to the region of the world in which the service will be used or might be necessary only in unusual situations. It is always a good idea to review the release notes for the specific version of IOS that you are using to make sure there are no caveats for the technology that you have chosen to implement.
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