Text you add to the criteria row in a query is case sensitive, so be careful or you may get unexpected results.

What contains the destination and source port numbers used to identify Application-layer protocols, and is the Transport-layer data unit?

A. frame B. packet C. segment D. data unit

A user who presses the wrong sequence of keys in a software program is a victim of ____.

A. a software design problem B. a software bug C. a user mistake D. poor training