CCNA 1 v7.0 Modules 4 - 7: Ethernet Concepts Exam Questions And Answers Rated A+ New Update Assured Satisfaction

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 fullduplex 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