network456 - Question 1 1 1 point Each type of cable has a prescribed bend radius which is the radius of the maximum arc into which you can loop a cable

network456 - Question 1 1 1 point Each type of cable has a...

This preview shows page 1 out of 75 pages.

Unformatted text preview: Question 1 1 / 1 point Each type of cable has a prescribed bend radius , which is the radius of the maximum arc into which you can loop a cable w Question options: 1 0 Question 2 1 / 1 point A power fluctuation that results in a temporary dimming of lights is known as a blackout. Question options: 1 0 Question 3 1 / 1 point The TIA/EIA standard for wall jacks in a work area require that at least one outlet be provided for data and one for voice. Question options: 1 0 Question 4 1 / 1 point Cable that is coated with flame-resistant polyvinyl chloride (PVC) is acceptable for use in plenum areas. Question options: 1 0 Question 5 1 / 1 point A NIC card cannot determine whether the frames it transmits and receives are using IP packets or a different layer 3 protoc Question options: 1 0 Question 6 1 / 1 point What type of power flaw involves a fluctuation in voltage levels caused by other devices on the network or by EMI? Question options: brownout blackout noise surge Question 7 1 / 1 point One watt is equal to how many volt-amps? Question options: 1.4 2 10 1,000 Question 8 1 / 1 point What is the maximum allowable distance for horizontal wiring? Question options: 100 ft 100 m 90 m 90 ft Question 9 1 / 1 point The radius of the maximum arc into which you can loop a cable without impairing data transmission is known as what opti Question options: metal stress factor arc coefficient bend radius flex rating Question 10 1 / 1 point How far away from fluorescent lights or other sources of EMI should cable be installed? Question options: at least 3 feet at least 5 feet at least 10 feet at least 20 feet Question 11 1 / 1 point What is the industry standard for rack height in rack units? Question options: 18U 22U 42U 54U Question 12 1 / 1 point Which method of transmission allows signals to travel in both directions over a medium simultaneously? Question options: half duplex simplex full-duplex multiplex Question 13 1 / 1 point Which method of transmission allows signals to travel in both directions over a medium but in only one direction at a time? Question options: full duplex half duplex simplex multiplex Question 14 1 / 1 point Ethernet exists at what layer of the OSI model? Question options: Layer 1 Layer 2 Layer 3 Layer 4 Question 15 1 / 1 point What is the maximum frame size for Ethernet II frames on a VLAN? Question options: 1500 bytes 1518 bytes 1522 bytes 1496 bytes Question 16 1 / 1 point When selecting a punch down block, what block type is more suitable for data connections? Question options: 10 block 22 block 66 block 110 block Question 17 1 / 1 point What component of the backbone runs between a building's floors and can be used to connect an MDF and IDF or multiple Question options: horizontal cross connect patch cable vertical cross connect diagonal cabling Question 18 1 / 1 point Where is a demarc located in relation to the structured cabling of an enterprise environment? Question options: in the Main Distribution Frame (MDF) at the Intermediate Distribution Frame (IDF) at the entrance facility between the MDF and the IDF Question 19 1 / 1 point Select the component of enterprise level structured cabling that serves as the location where an incoming network interface Question options: network interface device main distribution frame intermediate distribution frame entrance facility Question 20 1 / 1 point During termination of twisted pair cabling, what should be done to ensure minimal cross talk is introduced? Question options: No more than 1 inch of the cable should be exposed. No less than 1 inch of the cable should be exposed. Each pair should be stripped of insulation so that it doesn't get caught in the jack. Each pair should be twisted around another pair to reduce cross talk. Question 21 1 / 1 point What cable type comes in two different modes, single mode and multimode? Question options: UTP STP Fiber optic Coaxial Question 22 1 / 1 point Which of the following options is not a likely source of electromagnetic interference? Question options: power lines motors fiber optic cables microwaves Question 23 1 / 1 point In order to simplify console access to computers in a rack, what device is typically used to provide a central portal for all d Question options: KVM switch AVR switch terminal server multi-monitor breakout cable Question 24 1 / 1 point If the use of a pre-existing Ethernet infrastructure is desired for a SAN, what Transport Layer protocol should be utilized? Question options: Fibre Channel iSCSI SAS PATA Question 25 1 / 1 point What type of power converter changes the voltage of an AC current, such as when power over the main line from an electri Question options: inverter rectifier transformer voltage regulator Question 26 0 / 1 point Select the two terms below that are used to describe a UPS that provides continuous voltage to a device by switching virtua Question options: offline UPS standby UPS standby power supply failover power supply Question 27 0 / 1 point The standard that describes uniform, enterprise-wide cabling systems, regardless of who manufactures or sells the various p Question options: hierarchical cabling TIA/EIA-568 IEEE Commercial Building Wiring Standard structured cabling Question 28 1 / 1 point Equipment racks most commonly come in what two widths? Question options: 17 inch frame 18 inch frame 19 inch frame 23 inch frame Question 29 1 / 1 point Select the two Transport Layer protocols that are used by SANs: Question options: Fibre Channel iSCSI SAS SATA Question 30 1 / 1 point Select the maximum allowable distances for horizontal wiring for a span that connects a data jack on a wall to a data closet Question options: 100 m 90 m 10 m 5m Question 31 5 / 5 points Match each correct item with the statement below. __8__ __7__ __10__ __5__ 1 airflow 2 alternating current (AC) A device that changes the form3of electrical collision domain 4 direct current (DC) energy in s 5 FCS (frame check sequence) 6 inverter transformer, 7 NAS (Network attached storage) 8 power converter A specialized storage device or group of storage devices that provides centralized fault-tole 9 rack unit (RU) A device that maintains a constant voltage level 10 voltage regulatorfor either AC or DC electrical energy. The field in a frame responsible for ensuring that data carried by the frame arrives intact. It u A device that converts DC electrical energy to AC electrical energy. Better inverters will also con power, which helps protect sensitive electronic equipment from power fluctuations. __6__ The flow of electrical power at a steady rate in only one direction. __4__ The portion of an Ethernet network in which collisions could occur if two nodes transmit data a __3__ Electrical power flow on a circuit that continually switches direction. __2__ The industry-standard unit for measuring rack height. Standard racks are 42U tall—abo __9__ In a chassis, the path along which air from a cool air source is conducted, past equipm __1__ Question 32 4 / 4 points Match each correct item with the statement below. __6__ momentary dec 1 rectifier __1__ AC to DC 2 inverter __2__ DC to AC 3 UTP __4__ copper-based cable containing twisted-wire 4 STPpairs that are not only individually insulated, but also su __7__ complete powe __5__ transmits data via pulsing light sent from a laser or light-emitting diode (LED) 6 brownout 5 fiber optic ca copper-based cable that consists of one7orblackout more insulated twisted-wire pairs encased in a plastic she __3__ Question 33 1 / 1 point A volt-ampere (VA) is the product of the voltage and the ________________ of the electricity on a line. Question options: power current bit voltage Question 34 1 / 1 point The room where the _________________ is located is called the data closet. Question options: telecommunic intermediate demarc main distrib Question 35 1 / 1 point _______ are highly scalable and have a very high fault tolerance, massive storage capabilities, and fast data acces Question options: SAMs SANs SANs NASs NNSs Question 36 1 / 1 point A _____________ allows for an MTU as high as 9198 bytes. Question options: large frame jumbo frame IEEE frame huge frame Question 37 1 / 1 point 10. To ensure that any _____________ are detected, frames are made large enough to fill the Question options: collisions slidings deadlocks broadcastin Question 1 1 / 1 point Digital signals are composed of pulses of precise, positive voltages and ze Question options: 1 0 Question 2 1 / 1 point A serial cable with an RJ-45 connector is capable of being used through a Question options: 1 0 Question 3 1 / 1 point Multimode fiber contains a core that is larger than a single mode fiber cor Question options: 1 0 Question 4 1 / 1 point Because digital signals do not depend on amplitude or frequency differen Question options: 1 0 Question 5 1 / 1 point A continuity tester should not be used on a live network segment. Question options: 1 0 Question 6 1 / 1 point Using DWDM, a single fiber can carry between what two numbers of cha Question options: 60 80 160 200 Question 7 1 / 1 point What two items below are commonly expressed as bits transmitted per se Question options: frequency amplitude throughput bandwidth Question 8 1 / 1 point What two connector types are typically used to terminate RG-6 and RG-5 Question options: f-connectors BNC ST couplers J-hooks Question 9 1 / 1 point Frequencies used to convey speech over telephone lines fall between wha Question options: 100 Hz 300 Hz 3.3 KHz 5.5 KHz Question 10 0 / 1 point What is the maximum supported throughput and bandwidth / signal rate o Question options: 100 Mbps 1000 Gbps 100 MHz 350 MHz Question 11 1 / 1 point What term below is used to describe the outer-most layer of protective cov Question options: sheath shield braiding insulation Question 12 1 / 1 point What Ethernet standard below is also referred to as "thinnet"? Question options: 100Base2 10Base2 100BaseT 10BaseT Question 13 1 / 1 point What is the minimum category of UTP cable required in order to support Question options: Cat 3 Cat 5 Cat 5e Cat 6 Question 14 1 / 1 point What is the maximum supported throughput of a CAT6 cable? Question options: 100 Mbps 1 Gbps 10 Gbps 100 Gbps Question 15 1 / 1 point How many cable pairs are needed for 1000Base-T transmission over CAT Question options: 2 4 6 8 Question 16 1 / 1 point Standard PoE devices must be provided with how much power in order to function? Question options: 5 watts 12 watts 15.4 watts 25.5 watts Question 17 1 / 1 point What is the maximum distance for 10GBase-ER and 10GBase-EW on a seg Question options: 550m 300m 10km 40km Question 18 1 / 1 point What type of cross-talk occurs between wire pairs near the source of a sig Question options: far end cross talk near end cross talk alien cross talk pair migration cross talk Question 19 1 / 1 point Which of the following connectors is the most common for multimode fib Question options: ST SC FC MT-RJ Question 20 1 / 1 point A measure of a signal's strength at any given time is known as which ter Question options: amplitude frequency phase wavelength Question 21 1 / 1 point The number of times that a wave's amplitude cycles from its starting point, through its highest amplitude and its lowest am Question options: amplitude frequency wavelength phase Question 22 1 / 1 point WDM divides a beam of light into how many different wavelengths or col Question options: 10 20 30 40 Question 23 1 / 1 point Which type of multiplexing is defined by wavelength instead of frequenc Question options: FDM WDM CWDM DWDM Question 24 1 / 1 point Which option below reflects the standard impedance of an RG-6 cable? Question options: 50 ohms 60 ohms 65 ohms 75 ohms Question 25 1 / 1 point Phone companies make use of what type of multiplexing in order to allow Question options: WDM FDM DWDM CWDM Question 26 1 / 1 point The most common multiplexing technology used in conjunction with fiber Question options: DWDM CWDM FDM WDM Question 27 1 / 1 point A device that is responsible for modulating digital signals into analog sig Question options: A modem A transceiver A demuxer A multiplexer Question 28 1 / 1 point Ethernet is an example of what type of technology? Question options: broadband baseband wideband narrowband Question 29 1 / 1 point Since cable TV and cable Internet can share the same coaxial cable, they are considered to be what type of technology? Question options: broadband baseband narrowband wideband Question 30 1 / 1 point Using a form of transmission that allows multiple signals to travel simu Question options: embedding multiplexing coupling modulating Question 31 5 / 5 points Match each correct item with the statement below. A character encoding system consisting of 1128 characters. __3__ 1000Base-LX A form of transmission that allows multiple2 signals to travel simultaneously over one medium. __7__ 1000Base-TX An unwanted connection, such as when exposed wires touch each other. __8__ 3 ASCII Cross-talk measured at the far end of the4cable from the signal source. __6__ Cat (category) A multiplexing technique used over single-mode or multimode fiber-optic cable in whic __5__ 5 DWDM (Dense Wavelength Division Multiplexing) The amount of data that a medium transmits during a given(FEXT) period of time. __9__ 6 far end cross-talk 7 multiplexing 8 short circuit A Physical layer standard for networks that 9 throughput 10 wavelength achieves 1 pairs of wire __2__ __10__ __1__ The distance between corresponding points on a wave’s cycle, expressed in meters or feet. Physical layer standard for networks that specifies 1-Gbps transmission over fiber-optic cable u A term used to refer to a type of twisted-pair cable. All of the category cables fall under the TIA/E __4__ Question 32 1 / 1 point A ______________ is a voltage, frequency, pulse, or phase change i Question options: voltage symbol current signal ampere Question 33 1 / 1 point _____________ cable reverses all of the wires without regard to how Question options: rollover patch patch cross-over straight thro Question 34 1 / 1 point ____________ causes problems only when a receiving node is expecti Question options: Latency Jabber Brownout Noice Question 35 1 / 1 point A _____________ is a simple instrument that can measure many charact Question options: cablemeter TDR ValMeter multimeter Question 36 1 / 1 point A _____________ is a device that retransmits a digital signal in its Question options: converter repeater amplifier inverter Question 37 4 / 4 points Match each correct item with the statement below. __5__ pulses of prec 1 amplifier __6__ modifies analog signals to make them suitable for carrying data over a communication path 2 repeater __1__ an electronic device that increases the voltage, 3 TDR or strength, of analog signals __2__ a device that regenerates a digital signal4 in phase its original form __3__ accepts and analyzes the return signal, and basedsignal on its condition and the amount of time the signal 5 digital __4__ progress of a 6 data modulati Chapter_06_Wireless_Networking Question 1 1 / 1 point All wireless signals are carried through the air by electromagnetic waves. Question options: 1 0 Question 2 1 / 1 point Unlike wired signals, wireless signals originate from electrical current tra Question options: 1 0 Question 3 1 / 1 point Multipath signaling is a significant cause of fading. Question options: 1 0 Question 4 1 / 1 point NFC tags are v Question options: 1 0 Question 5 1 / 1 point The WPS PIN is vulnerable to brute force attacks. Question options: 1 0 Question 6 1 / 1 point The wireless spectrum, as defined by the FCC, spans frequencies betwee Question options: 2 KHz 9 KHz 300 GHz 500 GHz Question 7 1 / 1 point What two frequencies below are used for most wireless networks? Question options: 900 MHz 2.4 GHz 4.9 GHz 5 GHz Question 8 1 / 1 point At what two layers do wireless LANs operate at? Question options: Layer 1 Layer 2 Layer 3 Layer 4 Question 9 1 / 1 point What two options below are two different types of attacks against Bluetoo Question options: bluesniffing bluejacking bluespoofing bluesnarfing Question 10 1 / 1 point What two terms below describe a wireless network topology in which acce Question options: mesh WLAN infrastructure WLAN wireless gateway wireless mesh network (WMN) Question 11 1 / 1 point What signal propagation phenomena causes a wireless signal to split into Question options: reflection bounce diffraction scattering Question 12 1 / 1 point What signal propagation phenomena causes the diffusion, or the reflection i Question options: reflection bounce diffraction scattering Question 13 1 / 1 point Which command below can be used on Linux to modify the SSID of the acc Question options: ifconfig iwconfig wlanconfig ipconfig Question 14 1 / 1 point How many address fields exist in an 802.11 frame? Question options: 2 3 4 6 Question 15 1 / 1 point Select below the band that is not one of the Question options: 5.1 GHz 5.3 GHz 5.4 GHz 5.9 GHz Question 16 1 / 1 point Select below the network topology that is not a valid wireless network to Question options: bus infrastructure mesh ad hoc Question 17 1 / 1 point Ideally, stations must remain within what range of an access point in orde Question options: 100 feet 200 feet 300 feet 600 feet Question 18 1 / 1 point At what layer of the OSI model do the 802.11 standards vary? Question op Physical layer Network layer Data link layer Transport layer Question 19 1 / 1 point Which 802.11 standard was the first to utilize the 5 GHz band? Question options: 802.11b 802.11a 802.11g 802.11n Question 20 1 / 1 point Which 802.11 technology is the first Wi-Fi standard to approach gigabit E Question options: 802.11a 802.11b 802.11n 802.11ac Question 21 1 / 1 point What is the maximum theoretical throughput of 802.11n? Question options: 54 Mbps 65 Mbps 600 Mbps 1.3 Gbps Question 22 1 / 1 point Select below the name for the special signal that contains information that Question options: broadcast frame hello packet beacon frame announcement message Question 23 1 / 1 point In IEEE terminology, a group of stations that share an access point are sa Question options: extended service set basic service set modified service set generic service set Question 24 1 / 1 point What 802.11 frame type is involved in association and reassociation, inc Question options: management frames control frames data frames extended frames Question 25 1 / 1 point Which 802.11 frame type is related to medium access and data delivery Question options: management frames control frames data frames extended frames Question 26 1 / 1 point How does the 8 Question options: It uses the preamble header The frame check sequence dictates packet size The sequence control field indicates how packets will be s The duration field determines how long the station can tran Question 27 1 / 1 point Which 802.11 wireless innovation allows for the use of multiple antennas o Question options: MIMO channel bonding frame aggregation radio duplexing Question 28 1 / 1 point In an 802.11 data frame, what is the size of the frame check sequence fiel Question options: 2 bytes 4 bytes 6 bytes 8 bytes Question 29 1 / 1 point How many data streams are used in 802.11ac Wave 2 devices? Question op 2 data streams 3 data streams 4 data streams 8 data streams Question 30 1 / 1 point What is the max theoretical throughput of the 802.11ac wireless technol Question options: 600 Mbps 1.3 Gbps 3.47 Gbps 6.93 Gbps Question 31 1 / 1 point _________________ is an outdated wireless technology that has bee Question options: Bluetooth Bluetooth Micro Wave Infrared (IR) Blue Ray Question 32 1 / 1 point The proportion of noise to the strength of a signal is called the _ Question options: signal streng signal-to-no noise-to-sig Question 33 1 / 1 point Access points that include routing functions are also called _____ Question options: Linksys rout wireless rou Cisco router wired router Question 34 1 / 1 point __________________ is a form of radio commu...
View Full Document

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture