1.
A receiving host has failed to receive all of the segments that it should acknowledge. What can the host do to improve the reliability of this communication session?

2.
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.
Which of the following describe router functions?

4.
Routers operate at layer _____. LAN switches operate at layer _____. Ethernet hubs operate at layer _____. Word processing operates at layer _____.

5.
Which layer 1 devices can be used to enlarge the area covered by a single LAN segment?
1. Switch
2. NIC
3. Hub
4. Repeater
5. RJ45 transceiver

6.
What are two purposes for segmentation with a bridge?
1. To add more broadcast domains.
2. To create more collision domains.
3. To add more bandwidth for users.
4. To allow more broadcasts for users.

7.
Which of the following are types of flow control?
1. Buffering
2. Cut-through
3. Windowing
4. Congestion avoidance

8.
Which three statements are true about the operation of a full-duplex Ethernet network?
1. There are no collisions in full-duplex mode.
2. A dedicated switch port is required for each full-duplex node.
3. Ethernet hub ports are preconfigured for full-duplex mode.
4. In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
5. The host network card and the switch port must be capable of operating in full-duplex mode.

9.
What is the purpose of flow control?

10.
What are the decimal and hexadecimal equivalents for the binary number 10110111?""

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