Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）A. presentationB. sessionC. transportD. networkE. physical
Data transfer is slow between the source and destination. The quality of service requested by the transport layer in the OSI reference model is not being maintained. To fix this issue, at which layer should the troubleshooting process begin?（）
A. presentation
B. session
C. transport
D. network
E. physical
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根据下面的文字资料回答 66～70 题In low-speed network，it is usually adequate to wait for congestion to occur andthen react to it by telling the source of packets to slow down．In high-speednetworks，this approach oftenworks poorly，because in the（ 1 ）between sending thenotification and notification arriving at the source，thousands ofadditional（ 2 ）may aITive．In ATM network，a major tool forpreventing（ 3 ）is（ 4 ）control．when a host wants a new virtual（ 5 ），it mustdescribe the traffic to be offered and the service expected．第66题：文中（ 1 ）处正确的答案是（ ）。A．intervalB．timeC．slotD．delay
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In the open systems interconnection (OSI) reference model, "layer" means one of seven conceptually complete,(71) arranged groups of services, functions, and protocols, that extend across all open systems.Application layer provides means for the application(72) to access the OSI environment. Presentation layer provides for the selection of a common syntax for representing data.(73) layer provides the means necessary for cooperating presentation entities to organize and synchronize their dialog and to manage their data exchange. Transport layer provides a reliable end-to-end data transfer service. Network layer provides for the entities in the transport layer the means for transferring blocks of data, by(74) and switching through the network between the open systems in which those entities reside. Data link layer provides services to transfer data between network layer entities. Physical layer provides the mechanical, electrical, functional, and procedural means to establish, maintain and(75) physical connections for transfer of bits over a transmission medium.A．ranklyB．levellyC．layeredD．hierarchically
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The basic concept of a data(72)is the difference between data and information.A．warehouseB．storageC．baseD．service
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单选题When exporting metadata for the transportable tablespaces， what is the correct next step after confirming endian format？（）A Export the tablespaces using data pump.B Determine if the transportable set is self-contained.C Convert the datafiles using RMAN.D Copy the datafiles from source to destination.
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