网络安全测试题1（Network security test questions 1）.doc

网络安全测试题1（Network security test questions 1） 1. in the following man-made malicious attacks, the active attack is (A) A, identity counterfeiting B, data GG C, data flow analysis D, illegal access 2., data confidentiality refers to (C) A protects data exchanged between systems in the network, preventing data leaks from being intercepted B provides authentication of connected entity identity C prevents illegal entities from actively attacking users and ensures that the data received by the receiving party is consistent with the information sent by the sender D ensure that data data is issued by legitimate entities 3. of the following algorithms belong to asymmetric algorithms (B) A and Hash algorithms B RSA algorithm C, IDEA D, three heavy DES 4. in mixed encryption, the key that is used to encrypt and decrypt data (plaintext) in the communication process is (B) A, asymmetric algorithm public key B, key of symmetric algorithm C, the private key of the asymmetric algorithm The public key of the D and CA centers 5. of the following does not belong to the proxy service, the technical advantage is (D) A, you can achieve authentication B, internal address shielding and conversion function C, access control can be achieved D, can prevent data driven invasion 6. packet filtering technology is compared with proxy service technology (B) A and packet filtering technology are less secure, but have a significant impact on network performance B and packet filtering technology are absolutely transparent to applications and users C and proxy service technology have higher security, but it will not affect network performance obviously D, proxy service technology, high security, application and user transparency is also very high 7. when building bastion hosts (A) A, on the bastion host, you should set as few network services as possible B, you should set as many network services as possible on the bastion host C, give as much privileges as possible to the services that must be set D,