Network+ Chapter 4 – Flashcards
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noise
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What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI?
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1.4
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One watt is equal to how many volt-amps?
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100 m
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What is the maximum allowable distance for horizontal wiring?
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bend radius
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The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what option below?
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at least 3 feet
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How far away from fluorescent lights or other sources of EMI should cable be installed?
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42U
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What is the industry standard for rack height in rack units?
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full-duplex
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Which method of transmission allows signals to travel in both directions over a medium simultaneously?
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half duplex
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Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time?
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Layer 2
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Ethernet exists at what layer of the OSI model?
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1522 bytes
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What is the maximum frame size for Ethernet II frames on a VLAN?
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110 block
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When selecting a punch down block, what block type is more suitable for data connections?
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vertical cross connect
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What component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple IDFs?
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in the Main Distribution Frame (MDF)
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Where is a demarc located in relation to the structured cabling of an enterprise environment?
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entrance facility
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Select the component of enterprise level structured cabling that serves as the location where an incoming network interface enters a building and connects with the building's backbone cabling:
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No more than 1 inch of the cable should be exposed.
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During termination of twisted pair cabling, what should be done to ensure minimal cross talk is introduced?
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Fiber optic
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What cable type comes in two different modes, single mode and multimode?
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fiber optic cables
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Which of the following options is not a likely source of electromagnetic interference?
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KVM switch
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In order to simplify console access to computers in a rack, what device is typically used to provide a central portal for all devices on the rack?
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iSCSI
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If the use of a pre-existing Ethernet infrastructure is desired for a SAN, what Transport Layer protocol should be utilized?
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transformer
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What type of power converter changes the voltage of an AC current, such as when power over the main line from an electric company is changed before being delivered to a home?
