NCTI TECH 4 TO 5 CH. TEST
STUDY GUIDE
What term describes the number of wave crests that pass a fixed point during a particular period of time? - ANSWER Frequency In data networking, this term is defined as "Signals may flow in either direction, but not simultaneously". - ANSWER Half Duplex Two CPUs have the same size data bus. Which one will process data faster? - ANSWER The one with a higher clock speed This unique ID number is coordinated by the Institute of Electrical and Electronics Engineers and is used by only one network interface card anywhere in the world. - ANSWER Media access control address (MAC) 1 / 3
Which is a network management and utility software that is typically used by network administrators and information systems personnel when the network is unused or lightly used, often in the middle of the night? - ANSWER Back up and recovery Utilities Which of the following is also called "Thicknet" or "yellow wire" and includes two layers of foil shielding as well as an additional copper mesh shield? - ANSWER 10Base5 cable According to 10BaseT wiring rules, what is the maximum segment length without a repeater? - ANSWER 100m When light travels through a fiber-optic cable, the change in refractive index causes the light to refract off which of the following? - ANSWER The boundary between the core and the cladding Which of the following requires a laser transmitter? - ANSWER Single-mode fiber 2 / 3
In what part of a building would you typically find punch-down blocks? - ANSWER Wiring closet Encapsulation and protocol headers, decapsulation, and reassembly are three of the four basic techniques used whenever different layers of protocols work together. What is the fourth? - ANSWER Segmentation Which type of address is unique anywhere in the world? - ANSWER NIC address Which layer of the OSI protocol stack handles frames? - ANSWER Data Link Which of the following best represents a logical address? - ANSWER IPv6
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