a. Why do standards architectures have multiple layers?

b. To what does a standards layer provide services?

4b.) Standards layers provide services directly to ______.

a. The next-higher layer

b. The next-lower layer

c. All layers

d. Only themselves

c. If you change a standard at one layer, do standards at other layers need to be changed?

4c.) If you change a standard at one layer, you are not required to change standards at other layers.

a. True

b. False

d. Why may it be advantageous to change a standard if the standard at the layer below it is upgraded?

4d.) It is typically advantageous to change a standard if the layer ______ gets an upgraded standard.

a. Above it

b. Below it

c. At least two layers away

d. None of the above