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 rateB. bandwidthC. signal lossD. Dense Wavelength Division Multiplexing (DWDM)
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)
相关考题：
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
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
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.
●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
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 exchangesB.Subordinates, project team members, and the project sponsorC.One-time reports, weekly reports, and monthly reportsD.The telephone, facsimile, and data transmission
Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）A、 PIN photodiodesB、 zero-chirped lasersC、 Erbium-doped fiber amplifiersD、 dispersion compensating fiberE、 dispersion compensating Bragg grating
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 portsD、 Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E、 None of the other alternatives apply
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.
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 modeB、 Enable it in global mode and on every interface you need to supportC、 Enable it in global mode to support every individual fiber-optic interfaceD、 Enable it to create channels containing up to eight parallel links between switches
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 outagesB、Optimizing the efficiency with which IT operatesC、An increased need for specialized IT silosD、IT systems grow fast
Which device creates an OEO conversion？ （）A、 amplifierB、 attenuatorC、 regeneratorD、 light emitterE、 optical switchF、 optical receiverG、 fiber-optic cable
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 networkB、Direct the customer to redbooks and white papers on FC technologiesC、Work with business partner to include Lab Service engagement to setup FC environment and perform knowledge transferD、Switch project to iSCSI
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 routerB、FCIP routerC、DWDM and CWDMD、LC multi-mode 50 micron fiber
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 MirrorB、Metro MirrorC、Global CopyD、Global Mirror
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 MirrorB、FlashCopyC、Global MirrorD、Snapshot
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.
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 portsD Globally enables all ports on the device for Unidirectional Link Detection （UDLS）E None of the other alternatives apply
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?（）AI/O rateBbandwidthCsignal lossDDense Wavelength Division Multiplexing (DWDM)
多选题Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems? （）(Choose three.)APIN photodiodesBzero-chirped lasersCErbium-doped fiber amplifiersDdispersion compensating fiberEdispersion compensating Bragg grating
单选题Which statement is correct about an OSPF sham-link？（）AA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.BA sham-link is a logical link between PE routers that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.CA sham-link is a logical link between PE routers that carries OSPF LSAs and forwards customer traffic across it.DA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and carries OSPF LSAs.EA sham-link is a point-to-multipoint link that provides an OSPF adjacency between the PE routers and forwards customer traffic across it.
单选题What is the recommended practice regarding UDLD when implementing it in all fiber-optic LAN ports?（）AAdjust the default hello timers to three seconds for aggressive mode.BEnable it in global mode and on every interface you need to support.CEnable it in global mode to support every individual fiber-optic interface.DEnable it to create channels containing up to eight parallel links between switches.EEnable it in global mode to support every individual fiber optic and Ethernet interface.
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 modeB Enable it in global mode and on every interface you need to supportC Enable it in global mode to support every individual fiber-optic interfaceD Enable it to create channels containing up to eight parallel links between switches
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？（）AIn each data center， deploy one Hub Transport server. Create and configure one Send connector.BIn each data center， deploy two Hub Transport servers. Create and configure one Send connector.CIn each data center， deploy one Edge Transport server. Create and configure two Send connectors.DIn each data center， deploy two Edge Transport servers. Create and configure two Send connectors.
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?（）ACREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status NUMBER(10) DEFAULT 'PENDING', date_ordered DATE );BCREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) = 'PENDING', date_ordered DATE );CCREATE OR REPLACE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered DATE );DCREATE OR REPLACE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) = 'PENDING', date_ordered DATE );ECREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered DATE );FCREATE TABLE orders ( order_id NUMBER(10), customer_id NUMBER(8), order_status VARCHAR2(10) DEFAULT 'PENDING', date_ordered VARCHAR2 );
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?（）ACREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);BCREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);CCREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE DEFAULT SYSDATE);DCREATE OR REPLACE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status VARCHAR2 (10), date_ordered DATE = SYSDATE);ECREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE = SYSDATE);FCREATE TABLE orders ( order_id NUMBER (10), customer_id NUMBER (8), order_status NUMBER (10), date_ordered DATE DEFAULT SYSDATE);
多选题Which three technologies are used to reduce chromatic dispersion accumulation in fiber-optic transmission systems？（）APIN photodiodesBzero-chirped lasersCErbium-doped fiber amplifiersDdispersion compensating fiberEdispersion compensating Bragg grating
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.