CCNA 1 v7 Modules 4 - 7: Ethernet Concepts Questions and Answers 2023

When the store-and-forward method of switching is in use, what part of the Ethernet frame is used to perform an error check? CRC in the trailer What is the purpose of the OSI physical layer? transmitting bits across the local media Why are two strands of fiber used for a single fiber optic connection? They allow for full-duplex connectivity. Which characteristic describes crosstalk? 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? twisting opposing circuit wire pairs together Match the situation with the appropriate use of network media: backbone cabling in an enterprise fiber Optic Match the situation with the appropriate use of network media: guest access in a coffee shop Wireless Match the situation with the appropriate use of network media: horizontal cabling structure copper cable Match the situation with the appropriate use of network media: waiting rooms in a hospital Wireless Match the situation with the appropriate use of network media: desktop PCs in an enterprise office copper cable Match the situation with the appropriate use of network media: long-haul networks fibre optic Match the situation with the appropriate use of network media. 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? (Name three.) 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? (Name two.) It is not affected by EMI or RFI / It is more expensive than UTP cabling is. What is a primary role of the Physical layer in transmitting data on the network? 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? the magnetic field around the adjacent pairs of wire (Explanation: Crosstalk is a type of noise, or interference that occurs when signal transmission on one wire interferes with another wire. When current flows through a wire a magnetic field is produced. The produced magnetic field will interface the signal carried in the adjacent wire.) Refer to the graphic. What type of cabling is shown? Fiber (Explanation: Network cabling include different types of cables:UTP cable consists of four pairs of color-coded wires that have been twisted together and then encased in a flexible plastic sheath.STP cable uses four pairs of wires, each wrapped in a foil shield, which are then wrapped in an overall metallic braid or foil.Coaxial cable uses a copper conductor and a layer of flexible plastic insulation surrounds the copper conductor.Fiber cable is a flexible, extremely thin, transparent strand of glass surrounded by plastic insulation.) In addition to the cable length, what two factors could interfere with the communication carried over UTP cables? (Name two.) crosstalk / electromagnetic interference (Explanation: Copper media is widely used in network communications. However, copper media is limited by distance and signal interference.