Changing the field widths of controls that are grouped together in a stacked layout can be made to all controls without selecting each control

In the image shown above, the arrow is pointing at the region known as a(n) ________

Fill in the blank(s) with correct word

Which network component allows computers to communicate on a network without beingconnected directly to each other?

A. network medium B. interconnecting device C. network server D. device driver