N & S Day 2 Review for Day 3

What is the primary function of a switch in a network?

• To store data packets for later retrieval.

• To amplify signals in a network.

• To connect devices and forward data packets within a local area network.

• To provide internet access to devices.

Answer explanation

The primary function of a switch is to connect devices within a local area network and forward data packets between them, ensuring efficient communication.

Describe the difference between unshielded twisted pair (UTP) and shielded twisted pair (STP) cables.

• UTP cables are faster than STP cables.

• STP cables are more flexible than UTP cables.

• UTP cables lack shielding and are more prone to interference, while STP cables have shielding that protects against interference.

• UTP cables are used for fiber optic connections.

Answer explanation

The correct choice highlights that UTP cables lack shielding, making them more susceptible to interference, while STP cables include shielding that provides protection against such interference.

What are the characteristics of plenum-rated and riser-rated cables?

• Plenum-rated cables are designed for outdoor use; riser-rated cables are for indoor use.

• Plenum-rated cables have low smoke and flame spread ratings for air circulation spaces; riser-rated cables are fire-resistant for vertical spaces.

• Plenum-rated cables are thicker and more durable than riser-rated cables; riser-rated cables are not fire-resistant.

• Plenum-rated cables are used for high-voltage applications; riser-rated cables are used for low-voltage applications.

Answer explanation

Plenum-rated cables are specifically designed for air circulation spaces, featuring low smoke and flame spread ratings. Riser-rated cables are intended for vertical spaces and are fire-resistant, making this choice correct.

Explain the purpose of Ethernet connectors in networking.

• Ethernet connectors are used for wireless communication.

• Ethernet connectors are designed for video transmission.

• Ethernet connectors are primarily for power supply.

• Ethernet connectors enable physical connections for data transmission in networking.

Answer explanation

Ethernet connectors are essential for establishing physical connections between devices in a network, allowing for reliable data transmission. This distinguishes them from options related to wireless communication, video, or power supply.

What is the significance of T568A and T568B termination standards?

• T568A and T568B are Ethernet wiring standards that ensure proper pinout configuration for network cables.

• T568A and T568B are standards for fiber optic cables.

• T568A and T568B refer to wireless network protocols.

• T568A and T568B are used for telephone wiring configurations.

Answer explanation

T568A and T568B are crucial Ethernet wiring standards that define the pinout configuration for network cables, ensuring proper connectivity and performance in networking applications.

How does wavelength division multiplexing (WDM) enhance network capacity?

• WDM reduces network capacity by limiting the number of signals.

• WDM enhances network capacity by increasing the length of the fiber cable.

• WDM only works with electrical signals, not optical signals.

• WDM enhances network capacity by transmitting multiple signals on different wavelengths over a single fiber.

Answer explanation

Wavelength Division Multiplexing (WDM) enhances network capacity by allowing multiple signals to be transmitted simultaneously over a single fiber optic cable, each on a different wavelength, maximizing the use of available bandwidth.

What factors should be considered during the physical installation of fiber optic cables?

• Installation environment, cable type, bend radius, temperature and humidity, physical protection, distance limitations, local codes.

• Cost of installation

• Installation team size

• Cable color coding

Answer explanation

During fiber optic cable installation, factors like installation environment, cable type, bend radius, temperature and humidity, physical protection, distance limitations, and local codes are crucial for ensuring optimal performance and compliance.

What are the symptoms of a malfunctioning Network Interface Card (NIC)?

• Automatic device updates

• Frequent software crashes

• Consistent high-speed connection

• Symptoms of a malfunctioning NIC include inability to connect to the network, intermittent connection drops, slow speeds, and device recognition issues.

Answer explanation

The correct choice highlights key symptoms of a malfunctioning NIC, such as inability to connect, intermittent drops, slow speeds, and recognition issues, which are clear indicators of network interface problems.

Define the maximum transmission unit (MTU) in networking.

• The MTU is the minimum packet size required for transmission.

• The maximum transmission unit (MTU) is the largest packet size that can be transmitted over a network without fragmentation.

• The MTU is the total bandwidth available for a network connection.

• The MTU refers to the speed of data transmission in a network.

Answer explanation

The correct choice defines MTU as the largest packet size that can be sent over a network without fragmentation, which is crucial for efficient data transmission.

What is the role of the Spanning Tree Protocol in Ethernet networks?

• The Spanning Tree Protocol manages IP address allocation in Ethernet networks.

• The Spanning Tree Protocol increases network speed by aggregating bandwidth.

• The Spanning Tree Protocol is used to encrypt data in Ethernet networks.

• The Spanning Tree Protocol prevents loops in Ethernet networks by creating a loop-free topology.

Answer explanation

The Spanning Tree Protocol (STP) is essential in Ethernet networks as it prevents loops by creating a loop-free topology, ensuring efficient data transmission and network stability.