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ccna 200 301 booksmart trailer youtube.Which of the following layer devices can be used to extend the reach of a single LAN segment? (select two) A. Switch B. Network card C. Hub D. Repeater E. RJ45 transceiverSegmentation of the data stream occurs at what layer of the OSI model? A. physical layer B. data link layer C. network layer D. transport layer5.Which of the following describes the primary function of a router? (Choose four.) A. Packet switching B. Conflict prevention C. Packet filtering D. Broadcast domain expansion E. Interconnection network communication F. Broadcast forwarding G. Path selection6.Routers work at Layer 1. LAN switches work at Layer 1. Ethernet hubs work at Layer 1. Word processors work at Layer 1.2.7 Review Thinking QuestionsA. 3,3,1,7 B. 3,2,1,none C. 3,2,1,7 D. 2,3,1,7 E. 3,3,2,none7.Which of the following describes the function of the OSI model transport layer? A. Two host systems are physically located in separate networks, and this layer provides connectivity and path selection for the two host systems.B. This layer defines the format in which data is transmitted and controls how data is accessed on the physical medium C. This layer is responsible for establishing, managing, and terminating sessions between two communicating hosts D. This layer is responsible for segmenting data sent by the sender's host system andreassembled into the data stream8. Why does the data communications industry use a layered OSI reference model? A. It breaks down the network communication process into smaller and simpler parts, aids protocol development and design, and helps with troubleshooting B. It allows devices from different vendors to use the same electrical makeup, thus saving research and development