Which three functions are provided by the Junos OS for security platforms？（）（Choose three.)

A. an antispam license

B. DNS servers configured on the SRX Series device

C. SMTP services on SRX

D. a UTM profile with an antispam configuration in the appropriate security policy

E. antivirus (full or express)

A．units or periods of training or education

B．independent self-contained units of a spacecraft

C．parts of an electronic system which perform a particular function

Which one is telling about mastering agile innovation？

A.It might spread to another function, with the original practitioners acting as coaches.

B.It depends on having a cadre of eager participants.

C.It is similar with a process learned by Japanese martial arts students, especially those studying aikido, called shu-ha-ri.

D.It runs two-week sprints and conduct stand-up meetings three times a week.

ee OSPF neighbors, one connected to each of its three physical interfaces. Which statement is correct about router C？（）

A. It is configured and functioning correctly as an OSPF internal router.

B. It is configured and functioning correc tly as an ABR attached to stub area 4.

C. It is configured and functioning correctly as an ASBR attached to external area 4.

D. It is configured and functioning correctly as an ABR attached to totally stubby area 4.

E. It is not configured correctly to function as specified.

Flow control is a function that prevents network congestion by ensuring that(66)do not over-whelm(67)with data. There are three commonly used methods for handling network congestion.(68)is used by network devices to temporarily store bursts of excess data in memory until they can be processed.(69)are used by receiving devices to help prevent their buffers from overflowing.(70)is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

Flow control is a function that prevents network congestion by ensuring that(71)do not overwhelm(72)with data.

There are three commonly used methods for handling network congestion.(73)is used by network devices to temporarily store bursts of excess data in memory until they can be processed(74)are used by receiving devices to help prevent their buffers from overflowing.(75)is a flow-control scheme in which the source device requires an acknowledgment from the destination aider a certain number of packets have been transmitted.

A．transmitting devices

B．transmitted devices

C．receiving devices

D．received devices

d to what hardware.The major software components of the system being developed have to be identified and then allocated to the various hardware components on which the system will operate. All software systems can be divided into four basic functions. The first is（）. Most information systems require data to be stored and retrieved,whether a small file,such as a memo produced by a word processor,or a large database,such as one that stores an organization’s accounting records. The second function is the （）,the processing required to access data,which often means database queries in Structured Query Language. The third function is the （）,which is the logic documented in the DFDs,use cases,and functional requirements.The fourth function is the presentation logic,the display of information to the user and the acceptance of the user’s commands.The three primary hardware components of a system are （）.

A.architecture design B.modular design C.physical design D.distribution design A.data access components B.database management system C.data storage D.data entities A.data persistence B.data access objects C.database connection D.dataaccess logic A.system requirements B.system architecture C.application logic D.application program A.computers,cables and network B.clients,servers,and network C.CPUs,memories and I/O devices D.CPUs,hard disks and I/O devices

假定两个投资项目有相同的三个支付，但是每个支付相对应的概率各不相同，如下表所示:（1)求每个投

假定两个投资项目有相同的三个支付，但是每个支付相对应的概率各不相同，如下表所示:

(1)求每个投资项目的期望报酬和标准差。

(2)吉尔的效用函数为U=5I,式中，I为支付。她会选择哪个投资项目？

(3)肯恩的效用函数为U=,他会选择哪个投资项目？

(4)劳拉的效用函数为U=5I²,她会选择哪个投资项目？

Suppose that two investments have the same three payoffs, but the probability associated with each pay off differs，as illustrated in the table below:

a. Find the expected return and standard deviation of each investment.

b. Jill has the utility function U=5I, where I denotes the payoff. Which investment will she choose？

c. Ken has the utility function U=, Which investment will he choose？

d. Laura has utility function U=5I²，Which investment will he choose？

overwhelm_（）_ with data．There are three commonly used methods for handling network congestion．_（）_is used by network devices to temporarily store bursts of excess data in memory until they can be processed．_（）_ are used by receiving devices to help prevent their buffers from overflowing．_（）_ is a flow－control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted．

A.transmitting devices

B.transmitted devices

C.receiving devices

D.received devices@@@SXB@@@A.transmitting devices

B.transmitted devices

C.receiving devices

D.received devices@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering@@@SXB@@@A.Buffer

B.Source－quench messages

C.window

D.Windowing

E.Buffering

Object-oriented analysis focuses on creation of models. The three types of theanalysis model are （72）. There are two substages of object-oriented analysis. （73） focuses on real-world things whose semantics the application captures. The object constructedin the requirement analysis shows the （74） of the real-world system and organizes it intoworkable pieces.（75）addresses the computer aspects of the application that are visible tousers. The objects are those which can be expected to vary from time to time quite rapidly.

（71）

A. functional decomposition

B. object abstraction

C. data inheritance

D. information generalization

（72）

A. function model，class model and state model

B. class model，interaction model and state model

C. class model，interaction model and sequence model

D. function model，interaction model and state model

（73）

A. Static analysis

B. Semantic analysis

C. Scope analysis

D. Domain analysis

（74）

A. static structure

B. system components

C. data flows

D. program procedures

（75）

A. Program analysis

B. Function requirement

C. Application analysis

D. Physical model