4. Choose
three reasons why the networking industry uses
a layered model. (Choose 3)
A. Allow changes in
one layer to occur without changing other
layers
B. To get Gigabit speeds on LANs
C. Clarify what general functions is to be done rather than how
to do it
D. To create filter tables on LANs
E. Order network troubleshooting steps
Answer: A, C, E
The reasons to use a layer model are:
1 Clarify what general function is to be done rather than how to
do it.
2 Reduce the complexity of networking into more manageable sublayers.
3 Enable interoperability using standard interfaces.
4 Allow changes in one layer to occur without changing other layers.
5 Speed up network industry progress by allowing specialization.
6 Allow for shortcut explanations to facilitate protocol comparisons.
7 Order network troubleshooting steps.
8 Facilitate systematic troubleshooting.
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