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WorksheetsNetwork Fundamentals-Physical layer
Total questions: 14
Worksheet time: 7mins
What technique is used with UTP cable to help protect against signal interference from crosstalk?
Twisting the wires together into pairs.
Terminating the cable with special grounded connectors.
Encasing the cables within a flexible plastic sheath.
Wrapping a foil shield around the wire pairs.
Which statement describes crosstalk?
The distortion of the network signal from fluorescent lighting.
The distortion of the transmitted messages from signals carried in adjacent wires.
The loss of wireless signal over excessive distance from the access point.
The weakening of the network signal over long cable lengths.
Which statement correctly describes frame encoding?
It generates the electrical, optical, or wireless signals that represent the binary numbers of the frame.
It uses the characteristic of one wave to modify another wave.
It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.
Which statement describes throughput?
The measure of the bits transferred across the media over a given period of time.
The measure of the usable data transferred across the media.
The theoretical capacity of a particular medium to carry data.
The total amount of time it takes to get from one device to another.
What is the purpose of the OSI physical layer?
Controlling access to media.
Transmitting bits across the local media.
Exchanging frames between nodes over physical network media.
Performing error detection on received frames.
Which statement describes attenuation?
The loss of wireless signal over excessive distance from the access point.
The distortion of the network signal from fluorescent lighting.
The weakening of the network signal over long cable lengths.
The distortion of the transmitted messages from signals carried in adjacent wires.
Which statement describes bandwidth?
The speed at which bits travel on the network.
The theoretical capacity of a medium to carry data.
The amount of data that can flow from across the internet in a given amount of time.
The measure of usable data transferred over a given period of time.
What technique is used with UTP cable to help protect against signal interference from crosstalk?
Wrapping a foil shield around the wire pairs.
Encasing the cables within a flexible metallic sheath.
Twisting the wires together into pairs.
Terminating the cable with special designed grounded connectors.
Which statement correctly describes signaling?
It uses the characteristic of one wave to modify another wave.
It converts bits into a predefined code in order to provide a predictable pattern to help distinguish data bits from control bits.
It transmits data signals along with a clock signal which occurs at evenly spaced time durations.
It converts the frame binary numbers into electrical, optical, or wireless signals.
Which statement correctly describes network latency?
The measure of the bits transferred across the media over a given period of time.
The measure of the usable data transferred across the media.
The capacity of a particular medium to carry data.
The total amount of time it takes to get from one device to another.
The physical layer of the receiving device passes bits up to which higher level layer?
application
presentation
network
data link
What PDU is received by the physical layer for encoding and transmission?
Frame
Segment
Packet
Data
Which media uses microwave signals to represent bits?
Copper
Wireless
Fiber-optic
Point-to-Point
Which of the following is the widely used medium for networking due to relatively low cost, ease of use, and fast networking speeds?
Unshielded Twisted-Pair (UTP)
Fiber-optic
Coaxial Cable
Wireless
