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Examen
CCNA 1 v7.0 Modules 4 - 7: Ethernet Concepts Exam REVISED 2023//2024
CCNA 1 v7.0 Modules 4 - 7: Ethernet 
Concepts Exam REVISED 2023//2024 
What is the purpose of the OSI physical layer? - ANSWER transmitting bits across the 
local media* 
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 copp...