CompTIA’s Network+ certification Study Guide part 69 is a globally-recognized, vendor neutral exam that has helped over 235,000 IT professionals reach further and higher in their careers. The 2009 Network+ exam (N10-004) is a major update with more focus on security and wireless aspects of networking. Our new study guide has been updated accordingly with focus on network, systems, and WAN security and complete coverage of today’s wireless networking standards. | 666 Appendix C 15. Your network has 10 computers that are networked together using a Star topology. Which of the following is a possible point of failure for this topology which could bring down the entire network A. Cable B. Network card C. T-connector D. Hub Correct answer and explanation D. Hub. In a Star topology all computers are connected through one central hub. Computers are cabled to this hub making it a centralized point where the network is connected. If the hub fails the network would go down. Incorrect answers and explanations A B and C. Answer A is incorrect because if a cable broke or failed in some way it would only remove the computer connected to it from the network. Answer B is incorrect because a failed network card in a computer would only prevent that particular computer from being able to access the network. Answer C is incorrect because a T-connector is used to connect computers to a cable in a Bus topology. A Star topology is being used in this situation. CHAPTER 2 NETWORK MEDIA 1. You are the network administrator of a 10BaseT network. On the weekend when few people are working you run 110 m of cable to a new server that is being used as a file server. The cable is installed in a new section of the building where no cabling currently exists. When you attempt to access files on the server they are experiencing errors and corrupt data. Which of the following is most likely the cause of this problem A. Bandwidth B. Attenuation C. Crosstalk from a neighboring cable D. CSMA CD issues Correct answer and explanation B. Attenuation. Attenuation occurs when data transmitted over media weakens over distance. The scenario states that the cable length is 110 m which is 10 m longer than the maximum distance for 10BaseT. Incorrect answers and explanations A C and D. Answer A is incorrect because bandwidth is a measurement of the amount of data that can be Appendix C 667 passed over a cable in a given amount of time. Answer C is incorrect because the .
