Font size
WorksheetsITN - Module 4 - Physical Layer
Total questions: 15
Worksheet time: 6mins
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)
(a)
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
A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)
Security
Mobility Options
Packet Collisions
Interference
Coverage Area
Which of the following fiber-optic cable types use lasers in a single stream as a data light source transmitter?
Single-mode
Multi-mode
Double-mode
True or false. Wireless LANs operate in full-duplex allowing all devices to send or receive data at the same time so the number of users does not impact performance
True
False
Which standards organization oversees development of wireless LAN standards?
IEEE
IANA
ISO
IETF
Using the OSI model what layer is the Physical Layer represented?
7
3
2
1
