Which layer of the OSI model provides a user interface in the form of an entry point for programs to access the network infrastructure?

A ____________ appears as a small box with some accompanying text.

a. list box b. link c. check box d. radio button

A menu that appears when an object is clicked with the right mouse button is called:

A) a hypertext link. B) a shortcut keystroke. C) a context menu. D) tool-tip help.