發信人: wishforyou@kkcity.com.tw () 日期: 11 Jun 2003 14:22:46 GMT 標題: [急徵]Cisco TCPIP 第八章 的答案~~~ 信群: tw.bbs.comp.www 看板: TWBBS/www/A0VEEEPM 來源: <46cVMM$NTP@bbs.kkcity.com.tw>:94394, bbs.kkcity.com.tw 組織: KKCITY [急徵]Cisco TCPIP 第八章 的答案~~~ 目前只有題目....沒有答案~~~ 明天要考試(同樣的題目)...所以拜託各位大哥大姐...幫一下忙~~ 給我正確答案.... 請回我信箱...謝謝 ^^ //////////////////////////////////////////////////////////// 1 What is a possible problem associated with multiple building grounds? They are often at the same potential with respect to each other They do not allow electrical current to flow between the buildings Separate protective devices are needed at each building They may present a shock hazard due to different potentials 2 What is another term that can be used to describe an Intermediate Distribution Frame (IDF)? work area (WA) telecommunications outlet (TO) main cross-connect (MCC) horizontal cross-connect (HCC) 3 What is the purpose of providing a ground, or earth, connection on a wall power outlet? To reduce the resistance in the electrical circuit To link the neutral wire to ground To allow fault currents to flow to ground To complete the circuit for normal current to flow 4 An electrician has investigated your recent power problems and has suggested that they are caused by oscillation. What is the BEST solution to your problem? Move the network server to another room Replace UTP with fiber optic cable Rewire the electrical system Fit commercial surge suppressors 5 What is the ideal room temperature and relative humidity at which a wiring closet should be maintained? 21 degrees Celsius / 45 % relative humidity 21 degrees Fahrenheit / 45 % relative humidity 45 degrees Celsius / 21 % relative humidity 45 degrees Fahrenheit / 21 % relative humidity 6 In a controlled electrical circuit, which path do electrons normally follow? From the positively charged source to ground From the negatively charged source to a positively charged source From the more positively charged source to the less positively charged source From the negatively charged source to ground 7 Why is copper considered a good conductor of electricity? It offers a path of least resistance to current flow It is easily formed into wires It is cheaper than other metals It reduces power line noise 8 Why is fiber optic cable commonly used as a network backbone between campus buildings? It provides a less resistive path for electrical current to flow from one building to another It enhances the signals at the physical layer It reduces the hazardous effects of electrical potential difference and lightning strikes It is cheaper and easier to install than copper wire 9 What is an alternative name for backbone cabling? Horizontal cabling Vertical cabling Main cabling Trunk cabling 10 Why are exposed metal components normally connected to the ground, or earth, pin of a power outlet? The connection is needed to increase the resistance of the circuit to ground If an electrical fault occurs in the equipment, the connection will reduce the chance of shock Connecting the metal to ground makes it act like an insulator The ground connection can act as an alternative path for controlled current flow if the neutral wire is disconnected 11 Which of the following environmental specifications are recommended for a wiring closet ? Carpeted floor; tiled walls and an inward opening door Wooden floor; brick walls and fluorescent lighting Tiled floor; internal power outlets and a dropped ceiling Raised floor; wood covered walls and an internal light switch 12 What features should be considered when assessing a potential wiring closet? It should be secure and situated on the first (ground) floor It should be secure and close to the POP It should be within 150 m of the MDF and close to an entrance It should be an internal room and close to the electrical supply distribution 13 What is the term used to describe a problem in an electrical system between the hot, or live, wire and the neutral wire? An isolated mode problem A ground fault problem A common mode problem A normal mode problem 14 What is one of the most significant causes of oscillatory noise problems on a power circuit? Long wiring runs School photocopiers Locating power cables in elevator shafts Air conditioners cycling on and off 15 Where does the horizontal cable extend? From the main distribution frame in the wiring closet to the vertical cross connect in the intermediate distribution frame From the telecommunications outlet in the work area to the horizontal cross-connect in the telecommunications closet From the patch panel in the point of presence to the backbone connection in the customer premises equipment From the telecommunications outlet in the wiring closet to the conduit in the intermediate distribution frame 16 What function does an electrical insulator perform? It completes the circuit, allowing current to flow It reduces the resistance in an electrical circuit It allows a short circuit to be present It prevents uncontrolled current flow 17 What causes Electrostatic Discharge (ESD)? Long power lines Faulty electrical equipment An accumulation of static electricity An increase in atmospheric humidity 18 Which statement BEST describes the current flow in an electrical circuit with a DC source? It is constant over time It varies over time It increases with time It decreases with time 19 What is the maximum length specified for 62.5/125μm multimode optical fiber run between the MDF and IDF? 90 m 800 m 2000 m 3000 m 20 What device is best used to minimize the effects of power line sags and brownouts? A primary protection device A surge suppressor An optical isolator An uninterruptible power supply 21 Why can digital electronic equipment, such as a computer, malfunction if subjected to excessive power line noise? Logic gates are unable to correctly distinguish the noise polarity The noise enhances the digital signal edges The noise replaces the digital signal Logic gates are unable to correctly distinguish between a one and a zero 22 What are the three components that make up an uninterruptible power supply? A battery, inverter and battery charger A MOV, capacitor and diode A generator, changeover circuit and server software A circuit breaker, fuse and battery 23 Which of the following problems is caused by too high a humidity level in a wiring closet? Signal degradation Copper wire corrosion Insulation failure Power surges 24 A potential wiring closet has been identified in a building with a floor area of 930 sq. m. The distance from this closet to the furthest workstation is 127 m. How many ADDITIONAL wiring closets would need to be installed? 0 1 2 8 -- ┌─────◆ＫＫＣＩＴＹ◆─────┐  ╱  ╱  ￣ ▌￣ ￣ ╲╱ ＢＢＳ 城邦 │ bbs.kkcity.com.tw │  ╲  ╲  ╴ ▌ ▌ ▏ ＫＫ免費撥接 └──《From:163.25.118.43 》──┘ 電話:40586000 帳號:kkcity 密碼:kkcity  .