Wilkes Environmental Group needs help in designing its corporate WAN. (It plans to completely replace its legacy hodgepodge of connections and services.) Headquartered in Baton Rouge, Louisiana, the firm also has large, regional offices in Seattle, Phoenix, and Boston. These offices need a way to exchange email and large files. Most of the firm's 500 engineers and technical specialist spend at least half their time on road and while mobile, they need to upload data to their regional offices. At other times, they work from home and need fast and reliable connections to their regional offices. Describe at least two suitable WAN technologies for each of Wilke's three connectivity situations: office to office, mobile user-to-office, and home-to-office. Which options do you recommend above all and why?