HOTSPOT
For each of the following statements, select Yes if the statement is true. Otherwise, select No. Each correct selection is worth one point.

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DRAG DROP
Order the layers of the OSI model:

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A user reports that she cannot connect to network resources from a computer on the company network. The user was able to connect to the network resources yesterday.
You verify that the user's computer is properly physically connected to the network. You discover that the computer's IP address is 169.254.48.97.
You need to restore access to network resources.
What should you do next?

• A.Flush the cache on the DNS server.
• B.Reset the user's password on the server.
• C.Check your router's current routing tables.
• D.Verify that the DHCP service is available.

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This question requires that you evaluate the underlined text to determine if it is correct.
Plain old telephone service (POTS), most ISDN lines, and switched T1 lines are all examples of Message Switching.
Select the correct answer if the underlined text does not make the statement correct.
Select 'No change is needed'' if the underlined text makes the statement correct.

• A.Circuit Switching
• B.Packet Switching
• C.FDDI Switching
• D.No change is needed

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What are two characteristics of a mesh network topology? (Choose two.)

• A.It is fault tolerant because of redundant connections.
• B.Every node connects to every other node on the network.
• C.It works best for networks with a large number of nodes.
• D.It requires less cabling than either a star or ring topology.

Correct Answer: A,B

In a (full) mesh network topology, each of the network node, computer and other devices, are interconnected with one another. Every node not only sends its own signals but also relays data from other nodes. In fact a true mesh topology is the one where every node is connected to every other node in the network. This type of topology is very expensive as there are many redundant connections, thus it is not mostly used in computer networks. It is commonly used in wireless networks.
Illustration:

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