某局域网中有1台打印服务器、3台客户机和2台打印机，其连接拓扑如图4-2所示。在该系统中，打印服务器根据某台客户机的请求，将数据在一台打印机上输出。设打印服务器、各客户机及各打印机的可用性分别为a、b、c，则该系统的可用性为(6)。
- A．ab3c3
- B．a(1-b3)(1-c2)
- C．a(1-b)3(1-c)2
- D．a(1-(1-b)3)(1-(1-c)2)
-
(86)
- A．same
- B．different
- C．difference
- D．some
-
(84)
- A．synchronous
- B．Asynchronous
- C．symmetric
- D．asymmetric
-
(85)
- A．two related keys are
- B．a key is
- C．two unrelated keys are
- D．three keys are
-
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. There are two types of key technology: private key and public key. Private-key encryption methods are called(71)ciphers, information is encrypted with(72)both the sender and receiver hold privately. Public-key encryption methods are called(73)ciphers,(74)created for each user, encryption key and deception key are(75)
- A．synchronous
- B．Asynchronous
- C．symmetric
- D．asymmetric
-
(83)
- A．a key
- B．two keys
- C．three keys
- D．four keys
-
(81)
- A．in general
- B．in any term
- C．in set terms
- D．in terms of
-
(80)
- A．faced on
- B．faced with
- C．faced about
- D．faced up to
-
(79)
- A．consolidates
- B．consists
- C．considerate
- D．consoles
-
In the following essay, each blank has four choices. Choose the most suitable one from the four choices and write down in the answer sheet. Heterogeneous network environments consist of computer systems from(66)vendors that run(67)operating systems and communication protocols. An organization that(68)its computer resources is usually(69)the task of integrating its heterogeneous systems. Typically, each deparlment or division has defined its own network needs(70)OS, LAN topology, communication protocols,applications, and other components.
- A．same
- B．similar
- C．different
- D．difference
-
(78)
- A．same
- B．similar
- C．different
- D．difference
高级经济师考试试题精选练习（1）
高级经济师考试模拟练习题之单选题（1
高级经济师考试试题精选练习（2）
高级经济师考试试题精选练习（3）
高级经济师考试试题：经济法案例试题精
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高级经济师考试试题及答案：单选练习题
高级经济师考试试题：经济法案例试题精
高级经济师考试模拟题及答案练习(1)
高级经济师考试模拟题及答案练习(2)