信息安全工程師每日一練試題（2022/7/15）
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信息安全工程師每日一練試題內容（2022/7/15）
試題1
防火墻的經(jīng)典體系結構主要有三種，下圖給出的是（）體系結構。
A.雙重宿主主機
B.（被）屏蔽主機
C.（被）屏蔽子網(wǎng)
D.混合模式查看答案
試題參考答案：C
試題2
《網(wǎng)絡安全法》明確了國家落實網(wǎng)絡安全工作的職能部門和職責，其中明確規(guī)定由（ ）負責統(tǒng)籌協(xié)調網(wǎng)絡安全工作和相關監(jiān)督管理工作。
A.中央網(wǎng)絡安全與信息化小組
B.國務院
C.國家網(wǎng)信部門
D.國家公安部門查看答案
試題參考答案：C
試題3
BS7799標準是英國標準協(xié)會制定的信息安全管理體系標準，它包括兩個部分：《信息安全管理實施指南》和《信息安全管理體系規(guī)范和應用指南》。依據(jù)該標準可以組織建立、實施與保持信息安全管理體系，但不能實現(xiàn)（ ）。
A、強化員工的信息安全意識,規(guī)范組織信息安全行為
B、對組織內關鍵信息資產(chǎn)的安全態(tài)勢進行動態(tài)監(jiān)測
C、促使管理層堅持貫徹信息安全保障體系
D、通過體系認證就表明體系符合標準,證明組織有能力保障重要信息查看答案
試題參考答案：B
試題4
Trust is typically interpreted as a subjective belief in the reliability， honesty and security of an entity on which we depend （ ）our welfare .In online environments we depend on a wide spectrun of things , ranging from computer hardware,software and data to people and organizations. A security solution always assumes certain entities function according to specific policies.To trust is precisely to make this sort of assumptions , hence , a trusted entity is the same as an entity that is assumed to function according to policy . A consequence of this is that a trust component of a system must work correctly in order for the security of that system to hold, meaning that when a trusted（ ）fails , then the sytems and applications that depend on it can（ ）be considered secure.An often cited articulation of this principle is:＂ a trusted system or component is one that can break your security policy” ( which happens when the trust system fails ). The same applies to a trusted party such as a service provider ( SP for short )that is , it must operate according to the agreed or assumed policy in order to ensure the expected level of securty and quality of services . A paradoxical conclusion to be drawn from this analysis is that security assurance may decrease when increasing the number of trusted components and parties that a service infrastructure depends on . This is because the security of an infrastructure consisting of many.
Trusted components typically follows the principle of the weakest link , that is ,in many situations the the overall security can only be as strong as the least reliable or least secure of all the trusted components. We cannot avoid using trusted security components,but the fewer the better. This is important to understand when designing the identity management architectures,that is, fewer the trusted parties in an identity management model , stronger the security that can be achieved by it.
The transfer of the social constructs of identity and trust into digital and computational concepts helps in designing and implementing large scale online markets and communities,and also plays an important role in the converging mobile and Internet environments.Identity management (denoted Idm hereafter ) is about recognizing and verifying the correctness of identitied in online environment .Trust management becomes a component of （ ）whenever different parties rely on each other for identity provision and authentication . IdM and Trust management therefore depend on each other in complex ways because the correctness of the identity itself must be trusted for the quality and reliability of the corresponding entity to be trusted.IdM is also an essential concept when defining authorisation policies in personalised services.
Establishing trust always has a cost, so that having complex trust requirement typically leads to high overhead in establishing the required trust. To reduce costs there will be incentives for stakeholders to “cut corners”regarding trust requirements ,which could lead to inadequate security . The challenge is to design IdM systems with relatively simple trust requirements.Cryptographic mechanisms are often a core component of IdM solutions,for example,for entity and data authentication.With cryptography,it is often possible to propagate trust from where it initially exists to where it is needed .The establishment of initial（ ）usually takes place in the physical world,and the subsequent propagation of trust happens online,often in an automated manner.
（71）A.with
B. on
C. of
D. for
（72）A.entity
B.person
C.component
D.thing
（73）A. No longer
B. never
C. always
D.often
（74）A. SP
B. IdM
C.Internet
D.entity
（75）A.trust
B.cost
C.IdM
D. solution查看答案
試題參考答案：D、C、A、B、A
試題5
信息系統(tǒng)受到破壞后，會對社會秩序和公共利益造成特別嚴重損害，或者對國家安全造成嚴重損害，按照計算機信息系統(tǒng)安全等級保護相關要求，應定義為（）。
A.第一級
B.第二級
C.第三級
D.第四級查看答案
試題參考答案：D
試題6
計算機取證是將計算機調查和分析技術應用于對潛在的,有法律效力的證據(jù)的確定與提取.以下關于計算機取證的描述中,錯誤的是（ ）。
A.計算機取證包括保護目標計算機系統(tǒng)、確定收集和保存電子證據(jù),必須在開機的狀態(tài)下進行
B.計算機取證圍繞電子證據(jù)進行,電子證據(jù)具有高科技性、無形性和易破壞性等特點
C.計算機取證包括對以磁介質編碼信息方式存儲的計算機證據(jù)的保護、確認、提取和歸檔
D.計算機取證是一門在犯罪進行過程中或之后收集證據(jù)的技術查看答案
試題參考答案：A
試題7
網(wǎng)絡物理隔離有利于強化網(wǎng)絡安全的保障，增強涉密網(wǎng)絡的安全性。以下關于網(wǎng)絡物理隔離實現(xiàn)技術的表述，錯誤的是（ ）。
A．物理斷開可以實現(xiàn)處于不同安全域的網(wǎng)絡之間以間接方式相連接
B．內外網(wǎng)線路切換器通過交換盒的開關設置控制計算機的網(wǎng)絡物理連接
C．單硬盤內外分區(qū)技術將單臺物理PC虛擬成邏輯上的兩臺PC
D．網(wǎng)閘通過具有控制功能開關來連接或切斷兩個獨立主機系統(tǒng)的數(shù)據(jù)交換查看答案
試題參考答案：A
試題8
在下圖給出的加密過程中Mi,i=1,2,…,n表示明文分組，Ci,i=1,2,…,n表示密文分組，IV表示初始序列，K表示密鑰，E表示分組加密。該分組加密過程的工作模式是（ ）。
A.ECB
B.CTR
C.CFB
D.PCBC查看答案
試題參考答案：D
試題9
SM4是一種分組密碼算法，其分組長度和密鑰長度分別為（）。
A.64位和128位
B.128位和128位
C.128位和256位
D.256位和256位查看答案
試題參考答案：B
試題10
Diffie-Hellman密鑰交換協(xié)議是一種共享秘鑰的方案，該協(xié)議是基于求解( )的困難性。
A．大素數(shù)分解問題
B．離散對數(shù)問題
C．橢圓離散對數(shù)問題
D．背包問題查看答案
試題參考答案：B
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