6.
What are the decimal and hexadecimal equivalents for the binary number 10110111?
A. 69/0x2102
B. 183/B7
C. 173/A6
D. 83/0xC5
Answer & Explanation
Answer: Option B
Explanation:
You must be able to take a binary number and convert it into both decimal and hexadecimal. To convert to decimal, just add up the 1s using their values. The values that are turned on with the binary number of 10110111 are 128 + 32 + 16 + 4 + 2 + 1 = 183. To get the hexadecimal equivalent, you need to break the eight binary digits into nibbles (4 bits), 1011 and 0111. By add- ing up these values, you get 11 and 7. In hexadecimal, 11 is B, so the answer is 0xB7.
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7.
What is the purpose of flow control?
A. To ensure that data is retransmitted if an acknowledgment is not received.
B. To reassemble segments in the correct order at the destination device.
C. To provide a means for the receiver to govern the amount of data sent by the sender.
D. To regulate the size of each segment.
Answer & Explanation
Answer: Option C
Explanation:
Flow control allows the receiving device to control the transmitter so the receiving device’s buffer does not overflow.
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8.
Which three statements are true about the operation of a full-duplex Ethernet network?
There are no collisions in full-duplex mode.
A dedicated switch port is required for each full-duplex node.
Ethernet hub ports are preconfigured for full-duplex mode.
In a full-duplex environment, the host network card must check for the availability of the network media before transmitting.
The host network card and the switch port must be capable of operating in full-duplex mode.
A. 1, 2, and 5
B. 2 and 4
C. 2, 3 and 4
D. 5 only
Answer & Explanation
Answer: Option A
Explanation:
Full-duplex means you are using both wire pairs simultaneously to send and receive data. You must have a dedicated switch port for each node, which means you will not have collisions. Both the host network card and the switch port must be capable and set to work in full-duplex mode.
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9.
Which of the following are types of flow control?
Buffering
Cut-through
Windowing
Congestion avoidance
A. 1 and 2
B. 1, 3 and 4
C. 2 only
D. 3 only
Answer & Explanation
Answer: Option B
Explanation:
The common types of flow control are buffering, windowing, and congestion avoidance.
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10.
What are two purposes for segmentation with a bridge?
To add more broadcast domains.
To create more collision domains.
To add more bandwidth for users.
To allow more broadcasts for users.
A. 1 only
B. 2 and 3
C. 2 and 4
D. 4 only
Answer & Explanation
Answer: Option B
Explanation:
Bridges break up collision domains, which allow more bandwidth for users.