which type of software controls your application software and manages how your hardware devices work together?

which type of software controls your application software and manages how your hardware devices work together?A. System Software
B. Operating System
C. Utility Software
D. Application Software

An operating system (OS) is software that controls a computer. It manages hardware, runs applications, provides an interface for users, and stores, retrieves, and manipu- lates files.

 

which layer of OSI model used by router?

which layer of OSI model used by router?A. layer 2
B. layer 4
C. layer 3
D. All of above

Routers operate on the third layer of the OSI Model, the Network-Control Layer. Rather than passing packets based on the Media Access Control (MAC) Layer addresses (as bridges do), a router examines the packet’s data structure and determines whether or not to forward it.