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多选题Which two statements are true about encrypting RMAN backup?（） (Choose two.)AThe transparent encryption of backups uses the encryption walletBThe database uses the same encryption key for every encrypted backupCThe password encryption of backups only us

题目
多选题
Which two statements are true about encrypting RMAN backup?（） (Choose two.)
A

The transparent encryption of backups uses the encryption wallet

B

The database uses the same encryption key for every encrypted backup

C

The password encryption of backups only uses the password while creating and restoring backup

D

If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.

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相似问题和答案

第1题：

Which two statements are true about encrypting RMAN backup?() (Choose two.)

A. The transparent encryption of backups uses the encryption wallet

B. The database uses the same encryption key for every encrypted backup

C. The password encryption of backups only uses the password while creating and restoring backup

D. If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.


参考答案：A, C

第2题：

Symmetric, or private-key, encryption is based on a secret key that is shared by both communcating parties. The （ ） party uses the secret key as part of the mathematical operation to encrypt （ ） text to cipher text. The receiving party uses the same secret key to decrypt the cipher text to plain text. Asymmetric, or public-key, encryption uses two different keys for each user: one is a （ ） key known only to this one user; the other is a corresponding public key, which is accessible to anyone. The private and public keys are mathematically related by the encryption algorithm. One key ia used for encyption and the other for decryption, depending on the nature of the communication service being implemented. In addition, public key encryption technoligies allow digital （_______） to be placed on messages. A digital signature uses the sender's private key to encrypt some portion of the message. When the message is received, the receiver uses the sender's （） key tp decipher the digital signature to verify the sender's identity.横线处应选（ ）。


A. interpretation
B.signatures
C. encryption
D.decryption

答案：B
解析：
对称加密或私钥加密的基础是通信双方共享同一密钥。发送方使用一个密钥作为数学运算的一部分把明文加密成密文。接收方使用同一密钥把密文解密变成明文。在非对称或公钥加密方法中，每个用户使用两种不同的密钥:一个是只有这个用户知道的私钥;另一个是与其对应的任何人都知道的公钥。根据加密算法，私钥和公钥是数学上相关的。一个密钥用于加密，而另一个用于解密，依赖于实现的通信服务的特点而用法有所不同。此外，公钥加密技术也可以用于报文的数字签名。数字签名时使用发送方的私钥来加密一部分报文。当接收方收到报文时，就用发送方的公钥来解密数字签名，以便对发送方的标识进行验证。

第3题：

Examine the following RMAN command:RMAN> CONFIGURE ENCRYPTION FOR DATABASE ON;RMAN> BACKUP DATABASE PLUS ARCHIVELOG;Which prerequisite must be met before accomplishing the backup?()

A. Provide a password for the encryption

B. Set up an Oracle wallet for the encryption

C. No setup is required as it is a default encryption method

D. Both Oracle wallet and password must be set up for the encryption


参考答案：B

第4题：

Which two statements best describe the wireless security standard that is defined by WPA？ （Choose two.）（）

  • A、It specifies use of a static encryption key that must be changed frequently to enhance security.
  • B、It requires use of an open authentication method.
  • C、It specifies the use of dynamic encryption keys that change each time a client establishes a connection.
  • D、It requires that all access points and wireless devices use the same encryption key.
  • E、It includes authentication by PSK

正确答案:C,E

第5题：

Which two statements best describe the wireless security standard that is defined by WPA (Choose two.)（）。

  • A、It specifies use of a static encryption key that must be changed frequently to enhance security
  • B、It requires use of an open authentication method
  • C、It specifies the use of dynamic encryption keys that change each time a client establishes a connection
  • D、It requires that all access points and wireless devices use the same encryption key
  • E、It includes authentication by PSK

正确答案:C,E

第6题：

Which two statements best describe the wireless security standard that is defined by WPA (Choose two.)()。

A.It specifies use of a static encryption key that must be changed frequently to enhance security

B.It requires use of an open authentication method

C.It specifies the use of dynamic encryption keys that change each time a client establishes a connection

D.It requires that all access points and wireless devices use the same encryption key

E.It includes authentication by PSK


参考答案：C, E

第7题：

Which two statements about the Wired Equivalent Privacy （WEP） encryption mechanism are true？ （）

  • A、the two methods of authentication using the WEP encryption are open and shared key
  • B、the 802.11 standard defines WEP security using 128-bit keys
  • C、WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FAST
  • D、WEP is a scalable encryption solution that uses static keys for authentication
  • E、WEP security provides only one-way authentication
  • F、WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism

正确答案:A,E

第8题：

Which two statements are true about encrypting RMAN backup?()

A. The transparent encryption of backups uses the encryption wallet

B. The database uses the same encryption key for every encrypted backup

C. The password encryption of backups only uses the password while creating and restoring backup

D. If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.


参考答案：A, C

第9题：

Which description about asymmetric encryption algorithms is correct？（）

  • A、They use the same key for encryption and decryption of data.
  • B、They use different keys for decryption but the same key for encryption of data.
  • C、They use different keys for encryption and decryption of data.
  • D、They use the same key for decryption but different keys for encryption of data.

正确答案:C

第10题：

Which two statements about OSPF IPv6 routing are true？（）

  • A、It requires OSPF version 3.
  • B、automatically detects neighbors over NHMA interfaces
  • C、It supports encryption using
  • D、It uses LSA type 9
  • E、It uses LSA type 8

正确答案:A,E

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