CNT-Books wants an affordable way to establish remote connections for its salespeople, who log on from customersites all over the country, and its three branch offices. The company’s main office is in Phoenix, Arizona, and its branch offices are in Los Angeles, California; Chicago, Illinois; and Orlando, Florida. Explain what kind of connections the salespeople and branch offices should use and what kinds of services should be installed on the main office’s network to keep communication costs to a minimum.