CCNA 1 v7.0 Modules 4 - 7: Ethernet
Concepts Exam 2026 Questions and
Answers
What is the purpose of the OSI physical layer? - Correct answer-transmitting bits
across the local media*
Why are two strands of fiber used for a single fiber optic connection? - Correct
answer-They allow for full-duplex connectivity.*
Which characteristic describes crosstalk? - Correct answer-the distortion of the
transmitted messages from signals carried in adjacent wires*
Which procedure is used to reduce the effect of crosstalk in copper cables? -
Correct answer-twisting opposing circuit wire pairs together*
Match the situation with the appropriate use of network media. - Correct answer-*
copper cables - horizontal cabling structure / desktop PCs in an enterprise office
*fiber optic - backbone cabling in an enterprise / long-haul networks
*wireless - guest access in a coffee shop / waiting rooms in a hospital
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
, A network administrator is measuring the transfer of bits across the company
backbone for a mission critical financial application. The administrator notices that
the network throughput appears lower than the bandwidth expected. Which three
factors could influence the differences in throughput? - Correct answer-the amount
of traffic that is currently crossing the network / the type of traffic that is crossing
the network / the latency that is created by the number of network devices that the
data is crossing
What are two characteristics of fiber-optic cable? - Correct answer-It is not affected
by EMI or RFI(crosstalk) / It is more expensive than UTP cabling is
What is a primary role of the Physical layer in transmitting data on the network? -
Correct answer-create the signals that represent the bits in each frame on to the
media.
Explanation: The OSI physical layer provides the means to transport the bits that
make up a frame across the network media. This layer accepts a complete frame
from the data link layer and encodes it as a series of signals that are transmitted to
the local media.
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
Concepts Exam 2026 Questions and
Answers
What is the purpose of the OSI physical layer? - Correct answer-transmitting bits
across the local media*
Why are two strands of fiber used for a single fiber optic connection? - Correct
answer-They allow for full-duplex connectivity.*
Which characteristic describes crosstalk? - Correct answer-the distortion of the
transmitted messages from signals carried in adjacent wires*
Which procedure is used to reduce the effect of crosstalk in copper cables? -
Correct answer-twisting opposing circuit wire pairs together*
Match the situation with the appropriate use of network media. - Correct answer-*
copper cables - horizontal cabling structure / desktop PCs in an enterprise office
*fiber optic - backbone cabling in an enterprise / long-haul networks
*wireless - guest access in a coffee shop / waiting rooms in a hospital
©COPYRIGHT 2025, ALL RIGHTS RESERVE 1
, A network administrator is measuring the transfer of bits across the company
backbone for a mission critical financial application. The administrator notices that
the network throughput appears lower than the bandwidth expected. Which three
factors could influence the differences in throughput? - Correct answer-the amount
of traffic that is currently crossing the network / the type of traffic that is crossing
the network / the latency that is created by the number of network devices that the
data is crossing
What are two characteristics of fiber-optic cable? - Correct answer-It is not affected
by EMI or RFI(crosstalk) / It is more expensive than UTP cabling is
What is a primary role of the Physical layer in transmitting data on the network? -
Correct answer-create the signals that represent the bits in each frame on to the
media.
Explanation: The OSI physical layer provides the means to transport the bits that
make up a frame across the network media. This layer accepts a complete frame
from the data link layer and encodes it as a series of signals that are transmitted to
the local media.
©COPYRIGHT 2025, ALL RIGHTS RESERVE 2
