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OSI是Open System Interconnection的缩写，意为开放式系统互联参考模型，模型有七层结构。
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更多 “OSI是Open System Interconnection的缩写，意为开放式系统互联参考模型，模型有七层结构。” 相关考题
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●OSI(Open System Interconnection)安全体系方案X.800将安全服务定义为通信开放系统协议层提供的服务，用来保证系统或数据传输有足够的安全性。X.800定义了5类可选的安全服务。下列相关的选项中不属于这5类安全服务的是 (63) 。(63) A．数据保密性B．认证C．访问控制D．数据压缩
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OSI(Open System Interconnection)安全体系方案X.800将安全性攻击分为两类，即被动攻击和主动攻击。主动攻击包括篡改数据流或伪造数据流，这种攻击试图改变系统资源或影响系统运行。下列攻击方式中不属于主动攻击的是______。A．伪装B．消息泄漏C．重放D．拒绝服务
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●Which is the second layer from the bottom in Open System Interconnection Reference Model? (71)．(71) A. ApplicationB.Data linkC.NetworkD.Session
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DOS的英文表示是()。
A、Disk、Operating、SystemB、Daily、Operating、SystemC、Disk、Open、SystemD、Date、Open、System
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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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OSI参考模型中的OSI表示的是()。A.Organization Standard InstituteB.Organization Standard Inter connectionC.Open System InternetD.Open System Inter connection
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TCP functions at the Open System Interconnection(OSI)(61)layer, or Layer 4. Its chief responsibility is to ensure(62)end-to-end connectivity. IP, located one layer down, at the OSI network layer, or Layer 3, communicates the addresses of each(63)sender and receiver to the routers along the way. Routers and Layer 3 switches can read IP and other Layer 3(64). This information, combined with routing tables and other network intelligence, is all it takes to get(65)the room or around the world via TCP/IP.A．transposeB．translateC．transmitD．transport
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OSI (Open System Interconnection)安全体系方案X.800将安全性攻击分为两类，即被动攻击和主动攻击。主动攻击包括篡改数据流或伪造数据流，这种攻击试图改变系统资源或影响系统运行。下列攻击方式中不属于主动攻击的为______。A．伪装B．消息泄露C．重放D．拒绝服务
考题
OSI(Open System Interconnection)安全体系方案X.800将安全服务定义为通信开放系统协议层提供的服务，用来保证系统或数据传输有足够的安全性。X.800定义了5类可选的安全服务。下列相关的选项中不属于这5类安全服务的是______。A．数据保密性B．访问控制C．认证D．数据压缩
考题
Which of the following statements is NOT true?（）AThe open field system provided a good opportunity to experiment.BThe open field system wasted land.CThe open field system was wasteful of labor and time.DThe open field system made livestock farming difficult.
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Which of the following statements is NOT true?（）A、The open field system provided a good opportunity to experiment.B、The open field system wasted land.C、The open field system was wasteful of labor and time.D、The open field system made livestock farming difficult.
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在网络体系结构中，OSI表示（）A、Open System InterconnectionB、Open System InformationC、Operating System InterconnectionD、Operating System Information
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OSI代表（）A、Organization for Standards InstituteB、Organization for Internet StandardsC、Open Standards InstituteD、Open Systems Interconnection
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OSI参考模型中的OSI表示的是（）A、Organization Standard InstituteB、Organization Standard InterconnectionC、Open System InternetD、Open System Interconnection
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单选题Which of the following statements is NOT true?（）A
The open field system provided a good opportunity to experiment.B
The open field system wasted land.C
The open field system was wasteful of labor and time.D
The open field system made livestock farming difficult.
考题
单选题When it is necessary to open a refrigeration system for repairs and the system will be open for more than a few minutes, the open ends of the system should be （）.A
dehydratedB
purgedC
pluggedD
evacuated
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单选题OSI参考模型中的OSI表示的是（）A
Organization Standard InstituteB
Organization Standard InterconnectionC
Open System InternetD
Open System Interconnection
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单选题As an alternative to the conventional seawater cooling system, is based on principles about cooler locations, （）flow control and preheating, but with a central cooler and one additional set of pumps（）.A
the central cooling system, differentB
the central cooling system, the sameC
the open cooling system, differentD
the open cooling system, the same
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单选题OSI代表（）。A
Organization for Standards InstituteB
Organization for Internet StandardsC
Open Standards InstituteD
Open Systems Interconnection
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单选题在网络体系结构中，OSI表示（）。A
Open System InterconnectionB
Open System InformationC
Operating System InterconnectionD
Operating System Information
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单选题You have lost all your SYSTEM tablespace datafiles （system_01.dbf and system_02.dbf） nd the database has crashed. What would be the appropriate order of operations to correct the situation？（） a. Mount the database with the startup mount command. b. Take the SYSTEM datafile offline with the alter database command. c. Restore the SYSTEM_01.dbf datafile from backup media with the required archived redo logs. d. Restore all SYSTEM tablespace-related datafiles from backup media. e. Issue the recover tablespace SYSTEM command. f. Issue the recover datafile SYSTEM_01.dbf command. g. Open the database with the alter database open command. h. Open the database with the alter database open resetlogs command.A
a， c， f， gB
b， d， e， hC
a， b， c， f， gD
d， a， e， gE
b， c， f， e， g
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以下各项对OSI的描述正确的是: (1.0分) [单选.]
A. Organization for Standards Institute B. Organization for Internet Standards C. Open Standards Institute D. Open Systems Interconnection
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