Computer Networking
What does a switch do when a frame is received on an interface and the destination hardware address is unknown or not in the filter table?

Drops the frame
Sends back a message to the originating station asking for a name resolution
Forwards the switch to the first available link
Floods the network with the frame looking for the device

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Computer Networking
Why does the data communication industry use the layered OSI reference model?1. It divides the network communication process into smaller and simpler components, thus aiding component development, design, and troubleshooting.2. It enables equipment from different vendors to use the same electronic components, thus saving research and development funds.3. It supports the evolution of multiple competing standards and thus provides business opportunities for equipment manufacturers.4. It encourages industry standardization by defining what functions occur at each layer of the model.

3 only
2 and 3
1 and 4
1 only

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Computer Networking
The packets switching concept was first proposed

None of these
in the late 1950s for Defense Ministry of US
All of these
in the early 1960s for military communication systems, mainly to handle speech
in the late 1980s for the Defense Ministry of US.

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Computer Networking
You telnet into a remote device and type debug ip rip, but no output from the debug command is seen. What could the problem be?

You must type the show ip rip command first.
IP addressing on the network is incorrect.
You must use the terminal monitor command.
Debug output is sent only to the console.

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