● The Estimate Activity Resource process is closely coordinated with the （73）process.
（73）
A. Estimate Costs
B. Sequence Activities
C. Plan Communications
D. Conduct Procurements
● Both bus and tree topologies are characterized by the use of multipoint （71）. For the bus, all stations attach, through appropriate hardware（72）known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the （73）. A transmission from any station propagates the length of the medium in both directions and can be received by all other （74）.At each end of the bus is a （75) , which absorbs any signal, removing it from the bus.（71）A. mediumB. connectionC. tokenD. resource（72）A. processingB. switchingC. routingD. interfacing（73）A. treeB. busC. starD. ring（74）A. routersB. stationsC. serversD. switches（75）A. tapB. repeaterC. terminatorD. concentrator
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The Estimate Activity Resource process is closely coordinated with the(73) process.A．Estimate CostsB．Sequence ActivitiesC．Plan CommunicationsD．Conduct Procurements
● A transport layer protocol has several responsibilities. One is to create a process-to-process (program-to-program) communication; TCP uses port （71） to accomplish this. Another responsibility of a transport layer protocol is to create a （72） and error-control mechanism at the transport level. TCP uses a sliding （73） protocol to achieve flow control. It uses the acknowledgment packet, time-out, and retransmission to achieve （74） control. The transport layer is also responsible for providing a connection mechanism for the application program. The application program sends （75） of data to the transport layer. It is the responsibility of the transport layer at the sending station to make a connection with the receiver.（71）A. numbersB. connectionsC. diagramsD. resources（72）A. procedureB. functionC. routeD. flow（73）A. pathB. windowC. frameD. diagram（74）A. packetB. timeC. errorD. phase（75）A. portsB. streamsC. packetsD. cells
Software design is a(71)process .It requires a certain(72)of flair on the part of the designer. Design can not be learned from a book .It must be practiced and learnt by experience and study of existing systems .A well(73)software system is straightforward to implement and maintain ,easily(74)and reliable .Badly(73)software systems ,although they may work are(75)to be expensive to maintain ,difficult to test and unreliable.A．createB．createdC．creatingD．creative
试题（73）Tool for defining activities is（73）．（73）A．Dependency DeterminationB．Precedence Diagramming methodC．Rolling Wave PlanningD．Schedule network Templates
Both bus and tree topologies are characterized by the use of multipoint (71) ．For the bus，all stations attach，through appropriate hardware (72) known as a tap，directly to a linear transmission medium，or bus．Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (73) ．A transmission from any station propagates the length of the medium in both directions and can be received by all other (74) ．At each end of the bus is a (75) ，which absorbs any signal，removing it from the bus．（71）A．mediumB．connectionC．tokenD．resource
The Estimate Activity Resource process is closely coordinated with the（73） process.A．Estimate CostsB．Sequence ActivitiesC．Plan CommunicationsD．Conduct Procurements
