Day 4 Quiz - Ethernet Basics & Cabling

Objective 1.3/Day 4 -

Match each ethernet standard with its corresponding speed, cable type, distance limit:

• 40GBASE-T

• Speed: 10 Mbps

  Cable Type: Typically Cat 3 or better (e.g., Cat 5e, Cat 6)

  Distance Limit: Up to 100 meters

• 10BASE-T

• Speed: 100 Mbps

  Cable Type: Typically Cat 5 or better (Cat 5e or Cat 6 recommended)

  Distance Limit: Up to 100 meters

• 100BASE-TX

• Speed: 1 Gbps

  Cable Type: Cat 5e or better (Cat 6 recommended)

  Distance Limit: Up to 100 meters

• 1000BASE-T

• Speed: 10 Gbps

  Cable Type: Cat 6a or Cat 7 (Cat 8 for shorter distances)

  Distance Limit: Up to 100 meters (Cat 6a) or shorter distances (Cat 8)

• 10GBASE-T

• Speed: 40 Gbps

  Cable Type: Cat 8

  Distance Limit: Up to 30 meters

Answer explanation

10BASE-T:

Speed: 10 Mbps

Cable Type: Typically Cat 3 or better (e.g., Cat 5e, Cat 6)

Distance Limit: Up to 100 meters

100BASE-TX:

Speed: 100 Mbps

Cable Type: Typically Cat 5 or better (Cat 5e or Cat 6 recommended)

Distance Limit: Up to 100 meters

1000BASE-T (Gigabit Ethernet):

Speed: 1 Gbps

Cable Type: Cat 5e or better (Cat 6 recommended)

Distance Limit: Up to 100 meters

10GBASE-T (10 Gigabit Ethernet):

Speed: 10 Gbps

Cable Type: Cat 6a or Cat 7 (Cat 8 for shorter distances)

Distance Limit: Up to 100 meters (Cat 6a) or shorter distances (Cat 8)

40GBASE-T:

Speed: 40 Gbps

Cable Type: Cat 8

Distance Limit: Up to 30 meters

Objective 1.3/Day 4 -

Match each fiber standard with its corresponding speed, fiber type, distance limit.

• 1000BASE-LX

• Speed: 10 Gbps

  Fiber Type: Single-mode

  Distance Limit: Up to 10 kilometers

• 100BASE-SX

• Speed: 1 Gbps

  Fiber Type: Multimode

  Distance Limit: Up to 550 meters

• 10GBASE-SR

• Speed: 1 Gbps

  Fiber Type: Single-mode or multimode

  Distance Limit: Up to 5 kilometers (multimode) or up to 10 kilometers single-mode

• 1000BASE-SX

• Speed: 100 Mbps

  Fiber Type: Multimode

  Distance Limit: Up to 550 meters

• 10GBASE-LR

• Speed: 10 Gbps

  Fiber Type: Multimode

  Distance Limit: Up to 300 meters

Answer explanation

100BASE-SX:

Speed: 100 Mbps

Fiber Type: Multimode

Distance Limit: Up to 550 meters

1000BASE-SX (Gigabit Ethernet):

Speed: 1 Gbps

Fiber Type: Multimode

Distance Limit: Up to 550 meters

1000BASE-LX (Gigabit Ethernet):

Speed: 1 Gbps

Fiber Type: Single-mode or multimode

Distance Limit: Up to 5 kilometers (multimode) or up to 10 kilometers (single-mode)

10GBASE-SR (10 Gigabit Ethernet):

Speed: 10 Gbps

Fiber Type: Multimode

Distance Limit: Up to 300 meters

10GBASE-LR (10 Gigabit Ethernet):

Speed: 10 Gbps

Fiber Type: Single-mode

Distance Limit: Up to 10 kilometers

Objective 5.2/Day 4 -

A network technician is troubleshooting a cable connection between two network devices and notices that the LED status indicators on one end of the cable are not lighting up. What could be a possible cause of this issue?

• Attenuation

• Interference

• Incorrect pinout

• Dirty optical cables

Answer explanation

LED status indicators not lighting up typically indicate a physical connectivity issue. An incorrect pinout means that the wires at one end of the cable are not connected to the correct pins on the connector, resulting in a lack of connectivity. Attenuation refers to signal loss over the length of the cable and does not directly affect LED status indicators. Interference can disrupt signal transmission but would not necessarily prevent LED status indicators from lighting up. Dirty optical cables: Dirty optical cables might affect light transmission in fiber optic cables but would not impact LED status indicators on Ethernet cables.

Objective 5.2/Day 4 -

A network administrator is experiencing network performance issues and suspects that the cable's throughput may be compromised. Which common cable issue is most likely causing this problem?

• Decibel (dB) loss

• Bad ports

• Incorrect transceivers

• Interference

Answer explanation

Interference from external sources, such as electromagnetic interference (EMI) or radio frequency interference (RFI), can disrupt the signal transmission over the cable, leading to reduced throughput. Decibel (dB) loss: dB loss refers to the reduction in signal strength along the length of the cable and affects signal quality but is not directly related to interference. Bad ports on networking devices may cause connectivity issues but do not directly affect cable throughput. Incorrect transceivers: Incorrect transceivers could lead to compatibility issues but are not directly related to cable throughput

Objective 5.2/Day 4 -

A user reports intermittent connectivity problems with their Ethernet connection. After inspecting the cable, the technician discovers that it has been damaged and is causing an open circuit. What type of cable issue is this?

• Open/short

• Attenuation

• Incorrect pinout

• Duplexing issues

Answer explanation

An open circuit occurs when there is a break in the continuity of the cable, preventing the electrical signal from flowing through. This can lead to intermittent connectivity or complete loss of connection. Attenuation refers to signal loss over the length of the cable and is not related to a break in continuity. Incorrect pinout refers to incorrect wiring configuration and does not necessarily result in an open circuit. Duplexing issues involve problems with bidirectional communication but do not directly relate to an open circuit.

Objective 5.2/Day 4 -

A network engineer is setting up a new network switch and connecting it to the existing network infrastructure using a crossover cable. However, the link between the switch and the router is not establishing. What could be a possible cause of this issue?

• Dirty optical cables

• Incorrect transceivers

• Transmit and receive (TX/RX) reversed

• Shielded vs. unshielded cable

Answer explanation

In a crossover cable, the transmit (TX) and receive (RX) pairs are crossed over to allow direct communication between similar devices like two computers. However, when connecting a switch to a router, the cable should not be crossed over, leading to connectivity issues if TX and RX are reversed. Dirty optical cables might affect light transmission in fiber optic cables but would not impact the TX/RX pairing in Ethernet cables. Incorrect transceivers could lead to compatibility issues but would not directly cause TX/RX reversal. The type of cable shielding does not affect the TX/RX pairing and is not related to the issue described.

Objective 5.2/Day 4 -

match each tool with its corresponding purpose:

• Tone-generator

• Generates an audible tone on a specific wire or cable, helping to identify and trace cables in a network or telecommunications system.

• Punchdown-tool

• Utilized for terminating and connecting wires to punchdown blocks, keystone jacks, and patch panels in structured cabling systems.

• Cable-crimper

• Used to attach connectors (such as RJ45) to the ends of network cables, creating a secure connection.

Objective 5.2/Day 4 -

match each tool with its corresponding purpose:

• Optical-time-domain-reflectometer-(OTDR)

• Provides a way to test the functionality of network ports by looping signals back to the transmitting device, allowing for self-testing and diagnostics.

• Multimeter

• Measures the time it takes for optical signals to reflect back from fiber optic cables, enabling technicians to locate faults, breaks, or bends in the fiber.

• Loopback-adapter

• Measures various electrical properties such as voltage, current, and resistance, aiding in troubleshooting and diagnosing electrical issues in network equipment and cables.

Objective 5.2/Day 4 -

match each tool with its corresponding purpose:

• Fusion-splicers

• Checks the integrity and functionality of network cables by verifying connectivity, identifying faults such as open circuits or shorts, and ensuring proper wiring configurations.

• Wire-map

• Used to permanently join or splice together optical fibers, ensuring low signal loss and high reliability in fiber optic connections.

• Cable-tester

• Allows for the non-intrusive monitoring of network traffic by tapping into a network link to capture and analyze data packets.

• Tap

• Determines the continuity and correct wiring configuration of network cables, identifying any miswiring or termination errors.

Objective 5.2/Day 4 -

match each tool with its corresponding purpose:

• Fiber-light-meter

• Removes the outer insulation or jacket from network cables, exposing the inner conductors for termination or splicing.

• Cable-stripper

• Analyzes the frequency spectrum of signals, enabling technicians to detect and identify interference, noise, or unusual signal patterns in a network.

• Snips/cutters

• Used to cut and trim network cables cleanly and accurately during installation or maintenance tasks.

• Spectrum-analyzers

• Measures the power and intensity of light signals transmitted through fiber optic cables, helping to verify the performance and integrity of optical connections.