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信息安全工程师每日一练试题内容（2026/5/6）
试题1
The purpose of file integrity check is to discover whether tampered files or the kernel of the operating system have been replaced in the victim system. For UNIX systems, network administrators can use the ( ) command to directly compare binary files in the system with the corresponding files on the original distribution medium.
A．rmdir
B．scp
C．cmp
D．pwd查看答案
试题参考答案：C
试题2
流通数据禁止清单主要针对（ ）数据。
A．所有公开的商业数据
B．个人隐私数据
C．危害国家安全和社会稳定的数据
D．仅涉及企业内部管理的数据查看答案
试题参考答案：C
试题3
关于防火墙的主要安全功能指标描述不正确的是（ ）
A．DES、RC4、IDEA都是防火墙所能够支持的加密算法
B．SNMP管理、带宽管理都不是防火墙所能够支持的管理方式
C．防火墙所能够支持的审计方式包括远程审计和本地审计
D．防火墙所能够支持的认证类型包括口令方式、数字证书等查看答案
试题参考答案：B
试题4
Symmetric-key cryptosystems use the( ) key for encryption and decryption of a message,though a message or group of messages may have a different key than others. A significant disadvantage of symmetric ciphers is the key management necessary to use them securely.Each distinct pair of communicating parties must, ideally, share a different key, and perhaps each ciphertext exchanged as well. The number of keys required increases as the square of the number of network members,which very quickly requires complex key management schemes to keep them all straight and secret. The difficulty of securely establishing a secret( )between two communicating parties, when a secure channel doesn't already exist between them, also presents a chicken-and-egg problem which is a considerable practical obstacle for cryptography users in the real world.
Whitfield Difñie and Martin Hellman, authors of the first paper on public-key cryptography.
In a groundbreaking 1976 paper, Whitfield Diffie and Martin Hellman proposed the notion of public-key (also, more generally, called asymmetric key) cryptography in which two different but mathematically related keys are used-a public key and a private key. A public key system is so constructed that calculation of one key (the private key) is computationally infeasible( )the other (the public key), even though they are necessarily related. Instead, both keys are generated secretly, as an interrelated pair. The historian David Kahn described public-key cryptography as “the most revolutionary new concept in the field since poly-alphabetic substitution emerged in the Renaissance”.
In public-key cryptosystems,the( )key may be freely distributed,while its paired private key must remain secret. The public key is typically used for encryption, while the private or secret key is used for decryption. Diffie and Hellman showed that public-key cryptography was possible by presenting the Diffie-Hellman key exchange protocol.
In 1978, Ronald Rivest, Adi Shamir, and Len Adleman invented( ),another public-key system.
In 1997, it finally became publicly known that asymmetric key cryptography had been invented by James H. Ellis at GCHQ,a British intelligence organization, and that, in the early 1970s,both the Diffie-Hellman and RSA algorithms had been previously developed(by Malcolm J. Williamson and Clifford Cocks, respectively).
(1) A. different
B. same
C.public
D. private
(2)A. plaintext
B. stream
C.ciphertext
D.key
(3)A.from
B. in
C.to
D.of
(4)A.public
B.private
C.symmetric
D.asymmetric
(5) A.DES
B.AES
C.RSA
D.IDEA查看答案
试题参考答案：B、D、A、A、C
试题5
以下网络入侵检测不能检测发现的安全威胁是( )。
A．黑客入侵
B．网络蠕虫
C．非法访问
D．系统漏洞查看答案
试题参考答案：D
试题6
拒绝服务攻击主要是利用资源的（ ）以及分配策略的漏洞，长期占用有限资源不释放，使其他用户得不到应得服务。
A．可控性
B．有限性
C．可用性
D．完整性查看答案
试题参考答案：B
试题7
通用入侵检测框架模型（CIDF）由事件产生器、事件分析器、响应单元和事件数据库四个部分组成。其中向系统其他部分提供事件的是（ ）
A．事件产生器
B．事件分析器
C．响应单元
D．事件数据库查看答案
试题参考答案：A
试题8
以下对OSI（开放系统互联）参考模型中数据链路层的功能叙述中，描述最贴切是( )
A、保证数据正确的顺序、无差错和完整
B、控制报文通过网络的路由选择
C、提供用户与网络的接口
D、处理信号通过介质的传输查看答案
试题参考答案：A
试题9
下图是（ ）的原理图
A．单向认证
B．双向认证
C．多向认证
D．第三方认证查看答案
试题参考答案：A
试题10
交换机是构成网络的基础设备，主要功能是负责网络通信数据包的交换传输。交换机根据功能变化分为五代，其中第二代交换机又称为以太网交换机，其工作于OSI（开放系统互连参考模型）的 ( ) 。
A．物理层
B．数据链路层
C．网络层
D．应用层查看答案
试题参考答案：B
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