TestOut 1st Semester - 1st 9 Weeks Exam Review Questions And Answers Already Passed!!

You want to measure the voltage, amps, and ohms of various devices. What tool would you use? - You'd use a multi-meter. what's a multimeter? - a device for testing various electrical properties. i.e. ac/dc voltage, current (amps), resistance (ohms), capacitance, and frequency. What does a voltage event recorder do? - keeps track of voltage conditions on a power line. basic recorders simply keep track of the occurrence of under/over voltage conditions, while more advanced devices track conditions over time/create a graph, saving data from a program running on a computer. What's a butt set also called? - a lineman's handset. what is a butt set used for? what does it include? - testing analog telephone installations. includes: an earpiece, mouthpiece, dialing interface, and various connectors. What is a toner probe, and what is it used for? - a toner probe is 2 devices used together to trace the end of a wire from a known endpoint into the termination pt in the wiring closet. what is a cable certifier? - a cable certifier is a multi-function tool that verifies or validates that a cable or an installation meets the requirements for a specific architecture implementation. i.e. use a certifier to verify that a specific drop cable meets the specs for 1000BaseT networking. which of the following is true about single mode fiber optic network cabling? - the central core is smaller than that of multi-mode fiber optic cabling.How does a single mode fiber optic cable transmit data (and through what)? does single mode support longer or smaller transmission distances? - By transmitting a single ray (or mode) of light through glass or plastic fiber. supports longer transmission distances than multi-mode fiber optic cable & is also more expensive. also has a central core that is much smaller than that of multi-mode fiber optic cabling. how do msgs travel through a logical ring topology based network? - msgs travel from one device to the next until they reach the destination device. basically, in a logical ring topology; msgs travel to each device in turn. if the msg isn't intended for that device, the msg is forwarded to the next device on the network. name two fiber optic connectors that usually require polishing as part of an assembly process? - SC & ST connectors. fiber optic cable assembly is more complex than other assemblies. it's necessary to polish the exposed fiber tip to ensure that light is passed on from 1 cable to the next w/ no dispersion. what layer of the OSI model does a ROUTER operate/is located? - a router operates @ layer 3. what tool would you use to test a drop cable & the connection to the network? (basically you have a high speed GB nextwork, but one of your devices communicates on the network at 100 Mbps. what's wrong with it?) - you would use a cable certifier to test the drop cable & the connection to the network. what does a cable tester do? - a cable tester verifies that the cable can carry a signal from 1 end to the other, and that all wires are in their correct positions. What is a Time Domain Reflector (TDR) used for? - The TDR is used to measure the length of a cable/or to identify the location of a fault in the cable in CAT extension cables by sending electrical pulses on a wire in order to discover info about the cable. (tdr measures the impedance discontinuities, or in other words the echo received on the same wire in response to a signal on the wire.)Describe BASE-BAND network signaling. (2) answers - -uses the entire network medium as a single transmission channel. -divides the transmission medium into several channels. describe DE-MULTIPLEXING network signaling. - combines signals from multiple channels into a single channel. describe FREQUENCY-DIVISION MULTIPLEXING network signaling. - assigns different frequencies to different channels on the same network medium.