Practice on the design of a network architecture, for administration purposes.

In the company "INFOR-TRUE" that had 600 machines with Windows 8.1 and Windows 10, recently has acquired another company in Monterrey with another 600 machines with Windows 7, Windows 8 and Windows 10, the company before acquiring the company of Monterrey, had 3 main servers ("dns and web cache", web-server, Active Directory server), and in Monterrey had 5 servers ("dns and web cache", web server, mail_server, active directory server and an FTP server).
The company is in the journalism industry and is currently divided into a branch and a parent company, the parent company is distributed in 2 buildings located in Mexico City, one in Polanco and another in Pedregal, in the Polanco building is centralized the editorial process of the newspaper, and in the Pedregal building, is the administrative part of the company where the general director and all administrative departments are located. In Monterrey, the company is located in the San Pedro Garza García neighborhood and also has the same departments as the parent company, which is located in Mexico City.
In Mexico a newspaper is produced and distributed in the center of the country and in Monterrey a newspaper is produced and distributed in the north of the country.
It is required that you indicate which design you consider adequate to manage the equipment, it is requested that Windows software is used, since it is the one on which the infrastructure of the two companies is based.
The requirements of the newsroom area are of a higher security than the other departments of the company, due to the fact that it has confidential information, which needs to be protected in a special way, because currently there are hacktivist groups that have tried to penetrate the information systems used by the newsroom area.
The company uses standardized commercial software on all its desktop computers.

If 1 U.S. dollar is worth 0.690 English pounds, how many U.S. dollars are needed to purchase an item that costs 350 pounds?