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Publisher Summary
This chapter discusses the different types of transmission media used for physically conveying signals from one point to another. It explains the fundamental method of operation of each of these transmission media types, introduces the various system components, and discusses the application for each type. Some of the main bearer design considerations are discussed to enable the reader to make an informed decision as to which type of media to use for a particular application. The discussion begins with systems guided over a physical bearer; namely twisted pair and coaxial copper, fiber-optic cables, and the power distribution system. Twisted-pair cable is widely used, andit can transmit data at an acceptable rate—up to 100 Mbps in some network architecture. Coaxial cable is used for radio frequency and data transmission. The cable is remarkably stable in terms of its electrical properties at frequencies below 4 GHz and this makes the cable popular as the connection between a radio and its antenna. In addition, wireless systems, namely, microwave radio systems, satellite systems, and infra-red transmission, which require no specific bearer and radiate their signals as electromagnetic waves are discussed.
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Chapter 2 Test°DueApr 12 at 11:59pm°•Points100°•Questions40°•Time Limit999 MinutesAttempt HistoryAttemptTimeScoreLATESTAttempt 124 minutes97.5 out of 100Score for this quiz:97.5out of 100Submitted Apr 10 at 3:36pmThis attempt took 24 minutes.Question 12.5 / 2.5 ptsEach type of cable has a prescribed bend radius, which isthe radius of the maximum arc into which you can loop acable without impairing data transmission.FalseCorrect!True
Question 22.5 / 2.5 ptsThe TIA/EIA standard for wall jacks in a work area requirethat at least one outlet be provided for data and one forvoice.
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Question 32.5 / 2.5 ptsPlenum cable has a flame resistant coating and is used inthe space above ceiling tiles or below a sub-floor.Correct!
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Question 42.5 / 2.5 ptsThe industry standard height for a rack in rack units is42U.
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Question 52.5 / 2.5 ptsA 66 block is more suitable for data connections than theolder 110 block.TrueCorrect!False
2.5 / 2.5 ptsFiber-optic cable comes in two types: single-mode fiber(SMF) or multimode fiber (MMF).Correct!
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Question 70 / 2.5 ptsIn a rack setup, a device called a KVM allows multipleconsoles to connect to a single device on the rack.
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Question 82.5 / 2.5 ptsA master service agreement (MSA) is a contract that
defines the terms of future contracts between parties,such as payment terms or arbitration arrangements.
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Question 92.5 / 2.5 ptsThe process of designing, implementing, and maintainingan entire network is called the system life cycle.FalseCorrect!True
Question 102.5 / 2.5 ptsWhen planning horizontal cabling, what is the maximumallowable distance that can be used?
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300 metersCorrect!100 meters1,000 feetQuestion 112.5 / 2.5 ptsIn general, how much can a twisted-pair's cable be bentbefore data transmission may be impeded?
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Question 122.5 / 2.5 ptsWhat statement accurately describes what a cable bendradius determines?
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