A graphical user interface (GUI) is a type of user interface which allows people to interact with electronic devices such as computers; hand-held devices such as MP3 Players, Portable Media Players or Gaming devices; household appliances and office equipment with images rather than text commands. Refer to the following software tools, which one provides a GUI for router security setup and management, and a GUI for complete router management?

A.
Cisco Secure User Registration Tool

B.
Cisco Intrusion Prevention System

C.
Cisco Security Device Manager

D.
Cisco Voice Services Provisioning Tool