ITN - Module 4 - Physical Layer

A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)

• Crosstalk

• EMI

• Signal Attenuation

• RFI

• Length of cable

What technique is used with UTP cable to help protect against signal interference from crosstalk?

• Encasing the cables with a protective sheath

• Shortening the cable

• Wrapping foil shield around the wire pairs

• Twisting the wires together into pairs

What is one advantage of using fiber optic cabling rather than copper cabling?

• Easier to terminate

• Usually cheaper than copper

• Can carry signals much faster than copper

• Used for installing on tighter bends

What is indicated by the term throughput?

• Measurement of bits transferred across the media over a given period of time

• How long it takes to get from source to destination

• Measurement of unusable data transferred across the media

• Guaranteed amount of data transferable across the media

Why are two strands of fiber used for a single fiber optic connection?

• Prevents crosstalk

• Prevents EMI and EFI interference

• Allows full duplex connectivity

• Increases speed

• Used for redundancy

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

• Data Link

• Application

• Transport

• Physical

The throughput of a FastEthernet network is 100 Mb/s. The traffic overhead for establishing sessions, acknowledgments, and encapsulation is 15 Mb/s for the same time period. What is the goodput for this network? (Insert number only)

Refer to the exhibit. Which types of UTP cables cables can be used to connect the devices?

• 1 - Straight-through

  2 - Straight-through

• 1 - Straight-through

  2 - Crossover

• 1 - Crossover

  2 - Crossover

• 1 - Crossover

  2 - Straight-through

What colour is Single-mode Fiber?

• Orange

• Aqua

• Red

• Yellow

What wireless standard accommodates a low level data rate primarily for IoT?

• WiMAX

• Zigbee

• Bluetooth

• WiFi