_____ is a powerful operating system originally developed by AT&T for minicomputers-the predecessors of servers that are larger than PCs and smaller than mainframes.

When you merge layers, what is the name of the single merged layer?

A. The name of the last layer that was selected B. The name of the first layer that was selected C. A combination of all the names of all the merged layers D. It is unnamed until you name the layer.

10BaseT networks use the __________________ hybrid topology.

Fill in the blank(s) with the appropriate word(s).