Network Performance LST

Which of the following factors can lead to increased network latency?

• Using a switch-based network

• A high number of transmission errors

• Low network traffic

• High bandwidth availability

Answer explanation

A high number of transmission errors can cause packets to be retransmitted, increasing the time it takes for data to reach its destination, thus leading to higher network latency.

If a network has a high number of devices connected, what is the most likely impact on the network's performance?

• Increased bandwidth per device

• Decreased latency

• Reduced bandwidth per device

• Improved response time

Answer explanation

A high number of devices on a network typically leads to congestion, which reduces the available bandwidth for each device. This results in reduced bandwidth per device, negatively impacting overall network performance.

Which transmission medium is most suitable for high data transmission between different buildings?

• Twisted copper wire

• Fibre-optic cable

• Home Wi-Fi

• Business Wi-Fi

Answer explanation

Fibre-optic cable is the most suitable medium for high data transmission between buildings due to its high bandwidth, speed, and resistance to electromagnetic interference, making it ideal for long-distance communication.

What is the primary reason a hub-based network might experience higher latency than a switch-based network?

• Hubs have higher bandwidth

• Hubs broadcast messages to all devices

• Hubs are more expensive

• Hubs use fibre-optic cables

Answer explanation

Hubs broadcast messages to all devices, causing all devices to process every message, which increases latency. In contrast, switches send messages only to the intended recipient, reducing unnecessary traffic and latency.

How does network traffic type affect bandwidth allocation?

• All traffic types require the same bandwidth

• Low definition video requires more bandwidth than high definition video

• Some network switches can adjust bandwidth based on traffic type

• Email traffic always gets the highest bandwidth

Answer explanation

Some network switches can dynamically allocate bandwidth based on the type of traffic, ensuring that critical applications receive the necessary resources while optimizing overall network performance.

What is the typical bandwidth of business Wi-Fi?

• Up to 10 gigabits per second

• Up to 100 gigabits per second

• Up to 600 megabits per second

• Up to 6 gigabits per second

Answer explanation

The typical bandwidth for business Wi-Fi can reach up to 6 gigabits per second, making it suitable for high-demand environments. Other options exceed common standards for business use.

Which of the following best describes network latency?

• The total number of devices on a network

• The delay before a transfer of data begins

• The amount of data that can be transferred in a second

• The number of transmission errors

Answer explanation

Network latency refers to the delay before a transfer of data begins. It is a critical factor in network performance, affecting how quickly data can be sent and received.

What is the effect of increasing the number of devices on a Wi-Fi network?

• Increases the bandwidth available to each device

• Decreases the bandwidth available to each device

• Has no effect on bandwidth

• Increases network latency

Answer explanation

Increasing the number of devices on a Wi-Fi network divides the available bandwidth among them, leading to decreased bandwidth for each device. This is why the correct answer is that it decreases the bandwidth available to each device.

Which of the following is NOT a factor affecting network performance?

• Number of devices on the network

• Bandwidth of the transmission medium

• Type of network traffic

• Colour of the network cables

Answer explanation

The colour of the network cables does not impact network performance. In contrast, the number of devices, bandwidth, and type of traffic directly influence how well a network operates.

What is the typical bandwidth of twisted copper wire?

• Up to 10 gigabits per second

• Up to 100 gigabits per second

• Up to 600 megabits per second

• Up to 6 gigabits per second

Answer explanation

Twisted copper wire can support bandwidths up to 10 gigabits per second, making it suitable for high-speed data transmission. Other options listed are lower than this maximum capability.