A Solutions Architect Has Designed a New Web-Based Application That

A solutions architect has designed a new web-based application that will be hosted on a cloud service provider. The web server will be publicly accessible, and the database server it uses will be located in a private subnet that is only accessible from the subnet where the public-facing web server is located. The database server will not be accessible directly from the Internet. Which of the following might the solutions architect implement in order to manage and maintain the database server?

A) DMZ
B) Jump box
C) 802.1Q
D) NAC