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.

1 only
3 only
2 and 3
1 and 4

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Computer Networking
Which one of the following is true regarding VLANs?

You should not have more than 10 switches in the same VTP domain.
VTP is used to send VLAN information to switches in a configured VTP domain.
VLANs only work if you have a complete Cisco switched internetwork. No off-brand switches are allowed.
Two VLANs are configured by default on all Cisco switches.

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