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多选题
What two descriptions best define DWDM？ （）
A
a WDM system that is compatible with EDFA technology
B
an optical technology for transmitting up to 16 channels over multiple fiber strands
C
an optical technology for transmitting up to 32 channels over multiple fiber strands
D
a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDM
E
a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
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更多 “多选题What two descriptions best define DWDM？ （）Aa WDM system that is compatible with EDFA technologyBan optical technology for transmitting up to 16 channels over multiple fiber strandsCan optical technology for transmitting up to 32 channels over multiple fiber strandsDa technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDMEa technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM” 相关考题
考题
What three in combination are factors that can cause four－wave mixing in fiber－optic cables? ()(Choose three.)
A. low optical powerB. high optical powerC. few optical channelsD. many optical channelsE. low chromatic dispersionF. high chromatic dispersionG. too much power differential in the optical channels
考题
What is the international standard for transmitting data over a cable sys tem?()
A. PPPoEB. DOCSISC. CMTSD. AAL5
考题
Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?()
A. optical technology for transmitting up to 32 channels over multiple fiber strandsB. optical technology for transmitting up to 16 channels over multiple fiber strandsC. a WDM system that is compatible with EDFA technologyD. a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
考题
What are two enhancements that OSPFv3 supports over OSPFv2? ()
A.It requires the use of ARP.B.It can support multiple IPv6 subnets on a single link.C.It supports up to 2 instances of OSPFv3 over a common link.D.It routes over links rather than over networks.
考题
What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）A、 low optical poweB、 high optical powerC、 few optical channelsD、 many optical channelsE、 low chromatic dispersionF、 high chromatic dispersionG、 too much power differential in the optical channels
考题
Which two characteristics apply to a CAS T1 interface?（）A、signaling travels in-band B、up to 24 voice channels C、up to 32 voice channels D、signaling travels in time slot 17 E、uses Q.931 signaling protocol in a common channel
考题
Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?（）A、optical technology for transmitting up to 32 channels over multiple fiber strandsB、optical technology for transmitting up to 16 channels over multiple fiber strandsC、a WDM system that is compatible with EDFA technologyD、a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
考题
What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)A、low optical powerB、high optical powerC、few optical channelsD、many optical channelsE、low chromatic dispersionF、high chromatic dispersionG、too much power differential in the optical channels
考题
What two descriptions best define DWDM？ （）A、 a WDM system that is compatible with EDFA technologyB、 an optical technology for transmitting up to 16 channels over multiple fiber strandsC、 an optical technology for transmitting up to 32 channels over multiple fiber strandsD、 a technology for transmitting multiple optical signals using less sophisticated transceiver designthen CWDME、 a technology for transmitting more closely packed optical signals using more sophisticatedtransceiver designs than CWDM
考题
Which two statements best describe EtherChannel？（）A、EtherChannel technology helps aggregate traffic grouping multiple，full-duplex point-to-point linkstogetherB、EtherChannel technology is based on the 802.1 IEEE standC、EtherChannel can aggregate up to 800 Mbps，8 Gbps，or Gbps of aggregate bandwidth for a Fast EtherChannel，Gigabit EtherChannel，or 10 Gigabit EtherChannel connection respectivelyD、EtherChannel is defined for Rapid Spanning Tree for faster convergence
考题
What is the international standard for transmitting data over a cable sys tem?（）A、PPPoEB、DOCSISC、CMTSD、AAL5
考题
What are two enhancements that OSPFv3 supports over OSPFv2? （）A、It requires the use of ARP.B、It can support multiple IPv6 subnets on a single link.C、It supports up to 2 instances of OSPFv3 over a common link.D、It routes over links rather than over networks.
考题
In optical channel transport unit overhead （OTU OH）， what are general communication channels 1 and 2（GCC1/GCC2） used for？（）A、for trail trace identificationB、as the backward defect indicatorC、to transmit information between OTU termination pointsD、to extend command and management functions over several framesE、General communication channels 1 and 2 （GCC1/GCC2） do not belong to OTU OH
考题
Over the course of a day，a department performed multiple DML statements （inserts， updates， deletes） on multiple rows of data in multiple tables. The manager would like a report showing the time， table name，and DML type for all changes that were made. Which Flashback technology would be the best choice to produce the list？（）A、 Flashback DropB、 Flashback QueryC、 Flashback Transaction QueryD、 Flashback Versions QueryE、 Flashback Table
考题
Which phrase best describes RMAN multiplexed backup sets？（）A、Stripes a single backup set across multiple channels.B、Identical copies of backup pieces within a backup set.C、Multiple backup sets with multiple channels configured.D、Simultaneous reads from multiple files and writes into the same backup piece.
考题
WDM与（）本质是相同的。A、OFDM(optical frequency division multiplexing)B、OTDM(optical time division multiplexing)C、CDM(code division multiplexing)D、EDFA(erbium doped fiber amplifier)
考题
多选题Fibre Channel, or FC, is a gigabit-speed network technology primarily used for storage networking.Fibre Channel is standardized in the T11 Technical Committee of the InterNational Committee for Information Technology Standards (INCITS), an American National Standards Institute (ANSI) Caccredited standards committee.Which two of these correctly describe Fibre Channel?（）Asupports multiple protocolsBworks only in a shared or loop environmentCallows addressing for up to 4 million nodesDprovides a high speed transport for SCSI payloads
考题
单选题In optical channel transport unit overhead （OTU OH）， what are general communication channels 1 and 2（GCC1/GCC2） used for？（）A
for trail trace identificationB
as the backward defect indicatorC
to transmit information between OTU termination pointsD
to extend command and management functions over several framesE
General communication channels 1 and 2 （GCC1/GCC2） do not belong to OTU OH
考题
多选题What are two enhancements that OSPFv3 supports over OSPFv2? （）AIt requires the use of ARP.BIt can support multiple IPv6 subnets on a single link.CIt supports up to 2 instances of OSPFv3 over a common link.DIt routes over links rather than over networks.
考题
多选题What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）Alow optical poweBhigh optical powerCfew optical channelsDmany optical channelsElow chromatic dispersionFhigh chromatic dispersionGtoo much power differential in the optical channels
考题
单选题Over the course of a day，a department performed multiple DML statements （inserts， updates， deletes） on multiple rows of data in multiple tables. The manager would like a report showing the time， table name，and DML type for all changes that were made. Which Flashback technology would be the best choice to produce the list？（）A
Flashback DropB
Flashback QueryC
Flashback Transaction QueryD
Flashback Versions QueryE
Flashback Table
考题
单选题What should you do if you have transmitted a distress call a number of times on channel 16 and have received no reply?（）A
Repeat the message using any other channel on which you might attract attentionB
Key the microphone several times before transmitting againC
Turn up the volume on the receiver before transmitting againD
Report the problem to the head electrician
考题
多选题Which two statements best describe EtherChannel？（）AEtherChannel technology helps aggregate traffic grouping multiple，full-duplex point-to-point linkstogetherBEtherChannel technology is based on the 802.1 IEEE standCEtherChannel can aggregate up to 800 Mbps，8 Gbps，or Gbps of aggregate bandwidth for a Fast EtherChannel，Gigabit EtherChannel，or 10 Gigabit EtherChannel connection respectivelyDEtherChannel is defined for Rapid Spanning Tree for faster convergence
考题
单选题Which phrase best describes RMAN multiplexed backup sets？（）A
Stripes a single backup set across multiple channels.B
Identical copies of backup pieces within a backup set.C
Multiple backup sets with multiple channels configured.D
Simultaneous reads from multiple files and writes into the same backup piece.
考题
多选题Dense Wavelength Division Multiplexing (DWDM) is an important innovation in optical networks.Which two descriptions best define DWDM?（）Aoptical technology for transmitting up to 32 channels over multiple fiber strandsBoptical technology for transmitting up to 16 channels over multiple fiber strandsCa WDM system that is compatible with EDFA technologyDa technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .
考题
多选题Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）AChannel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.BChannel-associated signaling utilizes a separate TDM channel for transmitting control signals.CCommon channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.DCommon channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.EISDN BRIs implement channel-associated signaling.
考题
多选题What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)Alow optical powerBhigh optical powerCfew optical channelsDmany optical channelsElow chromatic dispersionFhigh chromatic dispersionGtoo much power differential in the optical channels
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