【单选题】OSI参考模型中的OSI表示的是 A: Organization Standard Institute B: Organization Standard Interconnection C: Open System Internet D: Open System Interconnection

在网络体系结构中，OSI表示（）。 A: AOpen System Interconnection B: BOpen System Information C: COperating System Interconnection D: DOperating System Information

OSI参考模型的OSI代表（ ） A: Organization for Standards Institute B: Organization for Internet Standards C: Open Standards Institute D: Open Systems Interconnection

The Atlantic Ocean is ( ). A: a closed system B: an open system C: an isolated system D: a homogeneous system

OSI是OSI/RM的简称,全称是Open Systems Interconnection Reference Model,意为开放系统互连参考模型。()

Walking on a crowded sidewalk is an example of which system () A: Closed B: Open

中国大学MOOC:"There is no nationwide system of government-owned medical facilities open to the general public but there are local government-owned medical facilities open to the general public.";

( )system<br/>interact with environment strongly. A: Open B: Close C: Bright D: Dark

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(21)。 A: 伪装 B: 消息泄露 C: 重放 D: 拒绝服务

能提供在线视频课程学习的是() A: OA(Open Access) B: OPAC(Open Public Access Catalogue) C: MOOC(Massive Online Open Courses) D: CALIS (China Academic Library & Information System)