Computer Networking
What is the main reason the OSI model was created?

To create a layered model larger than the DoD model.
So different networks could communicate.
So Cisco could use the model.
So application developers can change only one layer's protocols at a time.

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Computer Networking
Terminals are used to

None of these
collect data from the physical system
provide information for the manager
All of these
communicate management decisions to the physical system

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Computer Networking
You are working with a network that has the network ID 10.9.0.0 and contains 73 networks. In the next year, you will be adding an additional 27 branch offices to your company. For simplified management, you want to keep the most possible hosts per subnet. Which subnet mask should you management, you want to keep the most possible hosts per subnet. Which subnet mask should you use?

255.248.0.0
255.224.0.0
255.252.0.0
255.240.0.0
255.254.0.0

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