CCNA 1 FINAL PAPER PRACTICE
SOLUTION COMPLETE ANSWER PACK
●● Why are two strands of fiber used for a single fiber optic connection?
Answer: They allow for full-duplex connectivity.*
●● Which characteristic describes crosstalk?
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?
Answer: twisting opposing circuit wire pairs together*
●● Match the situation with the appropriate use of network media.
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
●● 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?
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?
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?
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.
●● With the use of unshielded twisted-pair copper wire in a network,
what causes crosstalk within the cable pairs?
Answer: the magnetic field around the adjacent pairs of wire
SOLUTION COMPLETE ANSWER PACK
●● Why are two strands of fiber used for a single fiber optic connection?
Answer: They allow for full-duplex connectivity.*
●● Which characteristic describes crosstalk?
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?
Answer: twisting opposing circuit wire pairs together*
●● Match the situation with the appropriate use of network media.
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
●● 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?
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?
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?
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.
●● With the use of unshielded twisted-pair copper wire in a network,
what causes crosstalk within the cable pairs?
Answer: the magnetic field around the adjacent pairs of wire
