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 multip

题目

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
相似考题

1.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

2.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 .

3.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.

4.What is the international standard for transmitting data over a cable sys tem?()A. PPPoEB. DOCSISC. CMTSD. AAL5

更多“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 multip”相关问题

  • 第1题：

    What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）

    • A、 low optical powe
    • B、 high optical power
    • C、 few optical channels
    • D、 many optical channels
    • E、 low chromatic dispersion
    • F、 high chromatic dispersion
    • G、 too much power differential in the optical channels

    正确答案:B,D,E

  • 第2题：

    Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）

    • A、 Channel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
    • B、 Channel-associated signaling utilizes a separate TDM channel for transmitting control signals.
    • C、 Common channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.
    • D、 Common channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.
    • E、 ISDN BRIs implement channel-associated signaling.

    正确答案:A,D

  • 第3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 strands
    • B、optical technology for transmitting up to 16 channels over multiple fiber strands
    • C、a WDM system that is compatible with EDFA technology
    • D、a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .

    正确答案:C,D

  • 第4题：

    What is the point of using a combiner? （）

    • A、Up to four sites can share one PCM link.
    • B、Several TRXs can share one antenna system.
    • C、The mobile can listen to two base stations at the same time.
    • D、Only one base station is needed per site.
    • E、Sending and transmitting can be performed from the same antenna.

    正确答案:B

  • 第5题：

    Which two statements best describe EtherChannel？（）

    • A、EtherChannel technology helps aggregate traffic grouping multiple，full-duplex point-to-point linkstogether
    • B、EtherChannel technology is based on the 802.1 IEEE stand
    • C、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 respectively
    • D、EtherChannel is defined for Rapid Spanning Tree for faster convergence

    正确答案:A,C

  • 第6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.

    正确答案:B,D

  • 第7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 identification
    • B、as the backward defect indicator
    • C、to transmit information between OTU termination points
    • D、to extend command and management functions over several frames
    • E、General communication channels 1 and 2 （GCC1/GCC2） do not belong to OTU OH

    正确答案:E

  • 第8题：

    单选题
    Which WAN technology was designed to give homes and small business high speed digital dial-up service over already existing communication infrastructure?（）
    A

    X25

    B

    Frame Relay

    C

    ATM

    D

    ISDN

    E

    ATX

    F

    None of the above


    正确答案： F
    解析： 暂无解析

  • 第9题：

    多选题
    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.


    正确答案： A,D
    解析： 暂无解析

  • 第10题：

    单选题
    What does the minimize load database parameter mean when backing up a database?（）
    A

    RMAN will attempt to make the backup run as fast as possible without any IO limitations. 

    B

    RMAN will automatically restrict the number of channels in use to one. 

    C

    RMAN will spread the backup IO over the total duration stated in the backup command.

    D

    RMAN will skip any datafile that currently is involved in an IO operation. RMAN will retry backing up the datafile later and an error will be raised at the end of the backup if the datafile cannot be backed up. 

    E

    Datafiles will be backed up; those having the lowest current number of IO operations will be backed up first. 


    正确答案： C
    解析： 暂无解析

  • 第11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 attention

    B

    Key the microphone several times before transmitting again

    C

    Turn up the volume on the receiver before transmitting again

    D

    Report the problem to the head electrician


    正确答案： D
    解析： 暂无解析

  • 第12题：

    多选题
    Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）
    A

    Channel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.

    B

    Channel-associated signaling utilizes a separate TDM channel for transmitting control signals.

    C

    Common channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.

    D

    Common channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.

    E

    ISDN BRIs implement channel-associated signaling.


    正确答案： D,E
    解析： 暂无解析

  • 第13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

    正确答案:A,B

  • 第14题：

    You are deploying two core switches， one in each building， 50 km away from each other. The cross-connection between them will be a Layer 2 2-gigabit EtherChannel with an 802.1Q trunk. You configured it correctly but the link does not come up. The port is in the "admin up" state， and the line protocol is in the "down" state. The fiber link is OK. What would be the most likely reason for the link not to come up？ （）

    • A、 The switches are not the same model
    • B、 You are not using the correct SFP
    • C、 You are not using correct optical media converters
    • D、 Configuration should be modified， because the distance is longer

    正确答案:B

  • 第15题：

    What three in combination are factors that can cause four-wave mixing in fiber-optic cables? （）(Choose three.)

    • A、low optical power
    • B、high optical power
    • C、few optical channels
    • D、many optical channels
    • E、low chromatic dispersion
    • F、high chromatic dispersion
    • G、too much power differential in the optical channels

    正确答案:B,D,E

  • 第16题：

    What is the recommended practice regarding UDLD when implementing it in all fiber-optic LANports？（）

    • A、 Adjust the default hello timers to three seconds for aggressive mode
    • B、 Enable it in global mode and on every interface you need to support
    • C、 Enable it in global mode to support every individual fiber-optic interface
    • D、 Enable it to create channels containing up to eight parallel links between switches

    正确答案:C

  • 第17题：

    What is the international standard for transmitting data over a cable sys tem?（）

    • A、PPPoE
    • B、DOCSIS
    • C、CMTS
    • D、AAL5

    正确答案:B

  • 第18题：

    Given the formula： （Fiber Attenuation * Km） + （Splice Attenuation * # of Splices） + （Connector Attenuation * # of Connectors） + （Optical Fiber or OADM） + Buffer（Fiber aging）） With regard to SONET/SDH optical calculations，  what will the given formula provide？（）

    • A、 fiber loss
    • B、 OSNR level
    • C、 post amplification
    • D、 index of reflection
    • E、 index of refraction
    • F、 power post amplification budget

    正确答案:A

  • 第19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)

    正确答案:A

  • 第20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 identification

    B

    as the backward defect indicator

    C

    to transmit information between OTU termination points

    D

    to extend command and management functions over several frames

    E

    General communication channels 1 and 2 （GCC1/GCC2） do not belong to OTU OH


    正确答案： C
    解析： 暂无解析

  • 第21题：

    多选题
    What three in combination are factors that can cause four-wave mixing in fiber-optic cables？（）
    A

    low optical powe

    B

    high optical power

    C

    few optical channels

    D

    many optical channels

    E

    low chromatic dispersion

    F

    high chromatic dispersion

    G

    too much power differential in the optical channels


    正确答案： E,D
    解析： 暂无解析

  • 第22题：

    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


    正确答案： B,A
    解析： 暂无解析

  • 第23题：

    多选题
    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 strands

    B

    optical technology for transmitting up to 16 channels over multiple fiber strands

    C

    a WDM system that is compatible with EDFA technology

    D

    a technology for transmitting more closely packed optical signals using more sophisticated transceiver designs than CWDM .


    正确答案： A,B
    解析： 暂无解析

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