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In order to link data centers, a customer is evaluating the installation of fiber optic cable between buildings that are 400 meters apart. The installation will require multiple patch panels and cables.Which of the following is the most critical factor to

题目

In order to link data centers, a customer is evaluating the installation of fiber optic cable between buildings that are 400 meters apart. The installation will require multiple patch panels and cables.Which of the following is the most critical factor to consider for this installation?（）

A. I/O rate

B. bandwidth

C. signal loss

D. Dense Wavelength Division Multiplexing (DWDM)

相似考题

1.Using fiber optic cable, optical communications have enabled telecommunication （93） to be made over much greater distances and （94）much lower levels of（95）in the transmission medium and possibly most important of all, optical fiber communications have enabled much higher data rates to be accommodatedA. links B. lines C. circuits D. devices A. through B. from C. at D. with A. dispersion B. loss C. noise D. data rate

2.Examine the data from the ORDERS and CUSTOMERS table.Which SQL statement retrieves the order ID, customer ID, and order total for the orders that are placed on the same day that Martin places his orders?（）A.B.C.D.

3.●The project manager must maintain an effective communication link with the customer's satisfaction with the progress of the project. The project manager maintains this link through (71).(71)A.periodic project reports, periodic visits to the customer, and telephonic exchangesB.subordinates, project team members, and the project sponsorC.one-time reports, weekly reports, and monthly reportsD.the telephone, facsimile, and data transmission

4.In a data communication system, which transport media can be described as following: Has two classes: single mode and multiple mode; with higher transmit rate; with the best reliabilityA．radio channelB．fiber optic cableC．twisted-pair cableD．coaxial cable

更多“In order to link data centers, a customer is evaluating the installation of fiber optic ca ”相关问题

  • 第1题：

    The project manager must maintain an effective communication link with the customer’s satisfaction with the progress of the project. The project manager maintains this link through()

    A.Periodic project reports, periodic visits to the customer, and telephonic exchanges
    B.Subordinates, project team members, and the project sponsor
    C.One-time reports, weekly reports, and monthly reports
    D.The telephone, facsimile, and data transmission

    答案：A
    解析：
    在项目的进展过程中，为了维护客户满意度，项目经理必须与客户保持有效的沟通机制，项目经理通过（71）来达到这一目的。（71）A.周期性项目报告，给客户定期拜访，电话交流B.从属，项目组成员，项目赞助商C.一次性报告，周报告，月报告D.电话，传真和数据传输

  • 第2题：

    On switch R1 you issue the "udld enable" global command.  What does this command accomplish？ （）

    • A、 Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）
    • B、 Enables all copper media LAN ports Unidirectional Link Detection （UDLD）
    • C、 Overrides the default UDLS setting for all ports
    • D、 Globally enables all ports on the device for Unidirectional Link Detection （UDLS）
    • E、 None of the other alternatives apply

    正确答案:A

  • 第3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4题：

    Which device creates an OEO conversion？ （）

    • A、 amplifier
    • B、 attenuator
    • C、 regenerator
    • D、 light emitter
    • E、 optical switch
    • F、 optical receiver
    • G、 fiber-optic cable

    正确答案:C

  • 第5题：

    A customer has two sites located 500 kilometers apart. The customer has both a high-speedInternet link and dark fiber between the sites. The customer wants to utilize storage resources ateither site leveraging replication for disaster recovery implementations. The customer wants to linkthese two sites together. Which option provides the highest performance and is most reliable？（）

    • A、iFCP router
    • B、FCIP router
    • C、DWDM and CWDM
    • D、LC multi-mode 50 micron fiber

    正确答案:C

  • 第6题：

    A customer requires an infrastructure to support disaster recovery of critical applications between two remote data centers. One data center is in Tokyo and one is in Beijing. The customer’s Recovery Point Objective （RPO） requires a six-hour window for a bandwidth of 100 MB/s and a new storage system for a total of 4 TB of data. They estimate 100 MB of new data produced hourly. What data synchronization method would be recommended to meet the requirements（）

    • A、Metro Mirror
    • B、FlashCopy
    • C、Global Mirror
    • D、Snapshot

    正确答案:C

  • 第7题：

    单选题
    On switch R1 you issue the "udld enable" global command.  What does this command accomplish？ （）
    A

     Enables all fiber-optic LAN ports for Unidirectional LINK Detection （UDLD）

    B

     Enables all copper media LAN ports Unidirectional Link Detection （UDLD）

    C

     Overrides the default UDLS setting for all ports

    D

     Globally enables all ports on the device for Unidirectional Link Detection （UDLS）

    E

     None of the other alternatives apply


    正确答案： A
    解析： 暂无解析

  • 第8题：

    多选题
    Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)
    A

    PIN photodiodes

    B

    zero-chirped lasers

    C

    Erbium-doped fiber amplifiers

    D

    dispersion compensating fiber

    E

    dispersion compensating Bragg grating


    正确答案： E,D
    解析： 暂无解析

  • 第9题：

    单选题
    What is the recommended practice regarding UDLD when implementing it in all fiber-optic LAN ports?（）
    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.

    E

    Enable it in global mode to support every individual fiber optic and Ethernet interface.


    正确答案： D
    解析： 暂无解析

  • 第10题：

    单选题
    Your network contains two data centers named Datacenter1 and Datacenter2. An Active Directory site exists for each data center.  The data centers connect to the Internet by using a direct link.  The data centers connect to each other by using a high-speed WAN link.  You plan to deploy Exchange Server 2010 Mailbox servers in both data centers. You need to plan message routing to meet the following requirements：.Ensure outbound delivery of e-mail messages if a single server fails .Automatically load balance the Hub Transport server in each site .Deploy the minimum number of servers What should you include in the plan？（）
    A

    In each data center， deploy one Hub Transport server. Create and configure one Send connector.

    B

    In each data center， deploy two Hub Transport servers. Create and configure one Send connector.

    C

    In each data center， deploy one Edge Transport server. Create and configure two Send connectors.

    D

    In each data center， deploy two Edge Transport servers. Create and configure two Send connectors.


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    You need to create a table named ORDERS that contain four columns: 1. an ORDER_ID column of number data type 2. aCUSTOMER_ID column of number data type 3. an ORDER_STATUS column that contains a character data type 4. aDATE_ORDERED column to contain the date the order was placed. When a row is inserted into the table, if no value is provided when the order was placed, today's date should be used instead. Which statement accomplishes this?（）
    A

    CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);

    B

    CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);

    C

    CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);

    D

    CREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);

    E

    CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);

    F

    CREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE DEFAULT SYSDATE);


    正确答案： D
    解析： 暂无解析

  • 第12题：

    问答题
    Practice 6　　Fiber-optic lines will form most of the backbone of the information highway, just as they do for the phone system today. Fiber-optic cable is made of long, thin strands of glass rather than wire, and it transmits information in the form of digitized pulses of laser light rather than the radio waves used by coaxial cable. Because light pulses have shorter wavelengths than radio waves, engineers can cram much more data into fiber-optic lines than into other kinds of cables and wires. A single fiber, for example, can handle a mind-boggling 5,000 video signals or more than 500,000 voice conversations simultaneously. This huge capacity allows it to transmit all signals digitally. So noise or static easily can be filtered out. Finally, because glass is an inherently more efficient medium for transmitting information than other materials, a fiber-optic line can transmit a signal thousands of miles without much “signal loss”. Fiber-optic cable, simply put, is the method of choice for transmitting massive quantities of information over long distances.　　Another key is “digital compression”—a variety of methods for reducing the amount of digital code (streams of ones and zeros) needed to represent a piece of information—whether it is a document, a still picture, a movie or a sound. Digital compression is most critical for transmitting video, because digitized video consumes enormous amounts of space. Just four seconds of a digitized film, for example, would completely fill a 100-megabyte hard drive. A feature film of typical length, if uncompressed, would occupy more than 350 ordinary compact discs.　　Compression techniques achieve their gins by recording only the changes from one frame to the next, The background image in a movie scene, for example, typically does not change much from one flame to another. In a digital compression scheme, the background would be recorded only once; after that, only the actors’ movements would be captured.　　One result is more choices—hundreds of channels coming through your cable TV line instead of dozens. Digital compression also makes it easier to piggyback data onto media that were not designed with data in mind: in particular, phone lines.

    正确答案：
    【参考译文】
    光纤电缆构成了今日电话系统的主干线,同样,它也将构成未来信息公路的主干线。光纤电缆的制造材料是细长的玻璃丝而不是金属导线,它的信息传输方式是激光数字脉冲而不是同轴电缆使用的无线电波。由于光脉冲的波长比无线电波的波长短,因而工程师可以输入光纤电缆的信息量之大令其他类型的电缆和导线望尘莫及。例如,一根光纤电缆可同时处理五千个电视信号或50多万次电话通话,简直令人惊奇。这种巨大的能力使它可以实现全部信号传输数字化,从而轻而易举地滤掉噪音或静电干扰。最后要指出的是,玻璃作为媒介,它本身的传输效率便高于其他材料,因而一条光纤电缆可将一个信号传输数千英里而几乎没有“信号流失”。简而言之,光纤电缆是远距离传输大量信息的最佳方式。
    另一关键技术是“数字压缩”技术——及减少数码(一连串的l和0)数量的各种方法,这种数码用来表示某种信息,如一份文件、一张静止图片、一部电影或一种声音。数字压缩技术对影像传送来说至关重要,因为数字化影像会占据大量的存储空间。例如,仅仅四秒钟的数字化影片,便要占据一百兆的硬盘存储空间。一部普通长度的故事片,如果未经压缩,要占350多张普通光盘。数据压缩技术只记录一个画面与下一个画面之间的变化,从而实现其功能。例如,电影场景的背景图像在一个画面转为另一个画面时通常是不变的,在数字压缩系统中,背景图像只被记录一次,此后便只记录演员的动作。
    数据压缩技术使可供选择的有线电视频道从几十个增加到几百个,数字压缩技术还能使数据更容易通过本不是用于传送数据的媒体线传送——特别是电话线。
    解析： 暂无解析

  • 第13题：

    Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）

    • A、 PIN photodiodes
    • B、 zero-chirped lasers
    • C、 Erbium-doped fiber amplifiers
    • D、 dispersion compensating fiber
    • E、 dispersion compensating Bragg grating

    正确答案:B,D,E

  • 第14题：

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

    • 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.
    • E、Enable it in global mode to support every individual fiber optic and Ethernet interface.

    正确答案:C

  • 第15题：

    You are the network consultant from passguide.com. In which situation you will advice your customer to implement data centers?（）

    • A、Protecting the business from information outages
    • B、Optimizing the efficiency with which IT operates
    • C、An increased need for specialized IT silos
    • D、IT systems grow fast

    正确答案:A,B,D

  • 第16题：

    A prospective customer has a SCSI installed. The new project requires a large high performance storage and tape network . The customer does not appear to understand the terminology and options of the fiber channel components of the solution. Further discussion confirms that the customers only has cursory knowledge of fiber channel and is not currently prepared to for the installation. What steps should be taken to make sure customer is satisfied with the solution？ （）

    • A、Suggest a cloud network
    • B、Direct the customer to redbooks and white papers on FC technologies
    • C、Work with business partner to include Lab Service engagement to setup FC environment and perform knowledge transfer
    • D、Switch project to iSCSI

    正确答案:C

  • 第17题：

    A customer has two data centers， 500 kilometers apart. The customer requests a proposal for new storage subsystems and a disaster recovery solution that provides consistent data in the event of a disaster at the local site.  Which IBM System Storage DS8000 solution should the storage  specialist propose to the client（）

    • A、Metro/Global Mirror
    • B、Metro Mirror
    • C、Global Copy
    • D、Global Mirror

    正确答案:D

  • 第18题：

    Your network contains two data centers named Datacenter1 and Datacenter2. An Active Directory site exists for each data center.  The data centers connect to the Internet by using a direct link.  The data centers connect to each other by using a high-speed WAN link.  You plan to deploy Exchange Server 2010 Mailbox servers in both data centers. You need to plan message routing to meet the following requirements：.Ensure outbound delivery of e-mail messages if a single server fails .Automatically load balance the Hub Transport server in each site .Deploy the minimum number of servers What should you include in the plan？（）

    • A、In each data center， deploy one Hub Transport server. Create and configure one Send connector.
    • B、In each data center， deploy two Hub Transport servers. Create and configure one Send connector.
    • C、In each data center， deploy one Edge Transport server. Create and configure two Send connectors.
    • D、In each data center， deploy two Edge Transport servers. Create and configure two Send connectors.

    正确答案:B

  • 第19题：

    单选题
    In order to link data centers, a customer is evaluating the installation of fiber optic cable between buildings that are 400 meters apart. The installation will require multiple patch panels and cables. Which of the following is the most critical factor to consider for this installation?（）
    A

    I/O rate

    B

    bandwidth

    C

    signal loss

    D

    Dense Wavelength Division Multiplexing (DWDM)


    正确答案： D
    解析： 暂无解析

  • 第20题：

    单选题
    Which statement is correct about an OSPF sham-link？（）
    A

    A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.

    B

    A sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.

    C

    A sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.

    D

    A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.

    E

    A sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    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： D
    解析： 暂无解析

  • 第22题：

    单选题
    You need to create a table named ORDERS that contains four columns: 1.an ORDER_ID column of number data type 2.a CUSTOMER_ID column of number data type 3.an ORDER_STATUS column that contains a character data type 4.a DATE_ORDERED column to contain the date the order was placed When a row is inserted into the table, if no value is provided for the status of the order, the value PENDING should be used instead. Which statement accomplishes this?（）
    A

    CREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status NUMBER(10) DEFAULT 'PENDING', date_ordered DATE );

    B

    CREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) = 'PENDING', date_ordered DATE );

    C

    CREATE OR REPLACE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered DATE );

    D

    CREATE OR REPLACE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) = 'PENDING', date_ordered DATE );

    E

    CREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered DATE );

    F

    CREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered VARCHAR2 );


    正确答案： F
    解析： 暂无解析

  • 第23题：

    多选题
    Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）
    A

    PIN photodiodes

    B

    zero-chirped lasers

    C

    Erbium-doped fiber amplifiers

    D

    dispersion compensating fiber

    E

    dispersion compensating Bragg grating


    正确答案： D,E
    解析： 暂无解析

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