Essential Network Cabling and Physical Layer Standards

Network Media and Physical Layer Standards

1. Fiber Optic Cable Runs

What kind of cable run is most often associated with fiber optic cable?

• Answer: Cable backbone

2. Corporate LAN Connectors

In most corporate LANs, what is the connector used with twisted-pair cable networks?

• Answer: RJ-45

3. Straight-Through Cable Usage

When is a straight-through cable used in a network?

• Answer: When a host connects to a switch

4. Unshielded Twisted Pair (UTP) Interference

With the use of unshielded twisted-pair copper wire in a network, what causes interference to the cable pairs?

• Answer: The magnetic field around the adjacent pairs of wire

5. OSI Physical Layer Specifications

What OSI layer is responsible for binary transmission, cable specification, and physical connectivity?

• Answer: Physical Layer

6. Fiber Optic Testing Devices

An installed fiber run can be checked for faults, integrity, and performance of the media by using what device?

• Answer: OTDR (Optical Time-Domain Reflectometer)

7. Common Network Cabling Types

XYZ Company is installing new cable runs on their data network. What two types of cable are commonly used for cabling? (Choose two.)

• Coaxial
• UTP-Cat6

8. Effects of Improper Connector Application

What is the possible effect of improperly applying a connector to a network cable?

• Answer: The data transmitted through that cable may experience signal loss.

9. Measures of Data Transfer

What are the three measures of data transfer? (Choose three.)

• Frequency
• Performance
• Bandwidth

10. Ethernet Connection Between Hosts

(Drawing) Refer to the exhibit. What type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?

• Answer: Crossover cable

11. Backbone Cabling for Hazardous Environments

In consistent LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?

• Answer: Fiber

12. Full Duplex Fiber Connectors

Which fiber connector supports full-duplex Ethernet? (Drawing pin)

• Answer: White

13. Wireless Signal Transmission

What method of signal transmission uses radio waves to carry signals?

• Answer: Wireless

14. Fiber Optic Cable Characteristics

What characteristics describe fiber optic cable? (Choose two.)

• Not affected by EMI or RFI.
• It is the most expensive type of LAN cabling.

15. Single-Mode Fiber Optic Characteristics

Which of the following is a characteristic of single-mode fiber optic cable?

• Answer: Generally uses LEDs as the light source

16. Benefits of Wireless Technology

What is considered a benefit of wireless technology as an option for media?

• Answer: Greater host mobility

17. Reducing UTP Interference

What characteristic of UTP cable helps reduce the effects of interference?

• Answer: Twisting (torsion) of the wires in the cable

18. Primary Function of the Physical Layer

What is a primary function of the physical layer in transmitting data over the network?

• Answer: Create the signals representing the bits in each frame as the means of communication.