There are two general approaches to attacking a （ ）encryption scheme.The first attack is known as cryptanalysis.Cryptanalytic attacks rely on the nature of the algorithm plus perhaps some knowledge of the general characteristics of the （ ） or even some sample plaintext-ciphertext pairs. This type of （ ） exploits the characteristics of the algorithm to attempt to deduce a specific plaintext or to deduce the key being used. If the attack succeeds in deducing the key, the effect is catastrophic: All future and past messages encrypted with that key are compromised. The second method, known as the （ ）-force attack, is to try every possible key on a piece of （ ） until an intelligible translation into plaintext is obtained. On average, half of all possible keys must be tried to achieve success.A.stream B.symmetric C.asymmetric D.advancedA.operation B.publication C.plaintext D.ciphertextA.message B.knowledge C.algorithm D.attackA.brute B.perfect C.atribue D.re searchA.plaintext B.ciphertext C.sample D.code
There are two general approaches to attacking a （ ）encryption scheme.The first attack is known as cryptanalysis.Cryptanalytic attacks rely on the nature of the algorithm plus perhaps some knowledge of the general characteristics of the （ ） or even some sample plaintext-ciphertext pairs. This type of （ ） exploits the characteristics of the algorithm to attempt to deduce a specific plaintext or to deduce the key being used. If the attack succeeds in deducing the key, the effect is catastrophic: All future and past messages encrypted with that key are compromised. The second method, known as the （ ）-force attack, is to try every possible key on a piece of （ ） until an intelligible translation into plaintext is obtained. On average, half of all possible keys must be tried to achieve success.
A.stream B.symmetric C.asymmetric D.advancedA.operation B.publication C.plaintext D.ciphertextA.message B.knowledge C.algorithm D.attackA.brute B.perfect C.atribue D.re searchA.plaintext B.ciphertext C.sample D.code
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Which two statements regarding symmetric key encryption are true?() (Choose two.) A. The same key is used for encryption and decryption.B. It is commonly used to create digital certificate signatures.C. It uses two keys: one for encryption and a different key for decryption.D. An attacker can decrypt data if the attacker captures the key used for encryption.
Which two wireless encryption methods are based on the RC4 encryption algorithm?() A.WEPB.CCKMC.AESD.TKIPE.CCMP
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 securityB.It requires use of an open authentication methodC.It specifies the use of dynamic encryption keys that change each time a client establishes a connectionD.It requires that all access points and wireless devices use the same encryption keyE.It includes authentication by PSK
There are two general approaches to attacking a ( )encryption scheme.The first attack is known as cryptanalysis.Cryptanalytic attacks rely on the nature of the algorithm plus perhaps some knowledge of the general characteristics of the ( ) or even some sample plaintext- ciphertext pairs. This type of ( ) exploits the characteristics of the algorithm to attempt to deduce a specific plaintext or to deduce the key being used. If the attack succeeds in deducing the key, the effect is catastrophic: All future and past messages encrypted with that key are compromised. The second method, known as the ( 4 )-force attack, is to try every possible key on a piece of ( ) until an intelligible translation into plaintext is obtained. On average, half of all possible keys must be tried to achieve success.（4）处应选_______. A. bruteB. perfectC. atribueD. research
There are two general approaches to attacking a ( )encryption scheme.The first attack is known as cryptanalysis.Cryptanalytic attacks rely on the nature of the algorithm plus perhaps some knowledge of the general characteristics of the ( ) or even some sample plaintext-ciphertext pairs. This type of (请作答此空 ) exploits the characteristics of the algorithm to attempt to deduce a specific plaintext or to deduce the key being used. If the attack succeeds in deducing the key, the effect is catastrophic: All future and past messages encrypted with that key are compromised. The second method, known as the ( )-force attack, is to try every possible key on a piece of ( ) until an intelligible translation into plaintext is obtained. On average, half of all possible keys must be tried to achieve success. A. messageB. knowledgeC. algorithmD. attack
There are two general approaches to attacking a (1)encryption scheme.The first attack is known as cryptanalysis.Cryptanalytic attacks rely on the nature of the algorithm plus perhaps some knowledge of the general characteristics of the ( ) or even some sample plaintext- ciphertext pairs. This type of ( ) exploits the characteristics of the algorithm to attempt to deduce a specific plaintext or to deduce the key being used. If the attack succeeds in deducing the key, the effect is catastrophic: All future and past messages encrypted with that key are compromised. The second method, known as the ( )-force attack, is to try every possible key on a piece of ( ) until an intelligible translation into plaintext is obtained. On average, half of all possible keys must be tried to achieve success.（1）处应选________. A. streamB.symmetricC. asymmetricD.advanced
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 keyB、the 802.11 standard defines WEP security using 128-bit keysC、WEP can provide stronger authentication through the use of LEAP， PEAP， or EAP-FASTD、WEP is a scalable encryption solution that uses static keys for authenticationE、WEP security provides only one-way authenticationF、WEPv2 offers improved encryption by replacing the RC4 encryption mechanism with the AES （symmetric block cipher） mechanism
You suspect that a hacker may be performing a MAC address flooding attack somewhere within the network. Which description correctly describes a MAC address flooding attack？（）A、The attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.B、Frames with unique， invalid destination MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.C、The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the destination address found in the Layer 2 frames sent by the valid network device.D、The attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the source address found in the Layer 2 frames sent by the valid network device.E、The attacking device spoofs a destination MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.F、Frames with unique， invalid source MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.G、None of the other alternatives apply
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 securityB、It requires use of an open authentication methodC、It specifies the use of dynamic encryption keys that change each time a client establishes a connectionD、It requires that all access points and wireless devices use the same encryption keyE、It includes authentication by PSK
Which two wireless encryption methods are based on the RC4 encryption algorithm? （）A、WEPB、CCKMC、AESD、TKIPE、CCMP
Which two statements best describe enhanced wireless security encryption？（）A、TKIP protects RC4 encryption keysB、CKIP and TKIP protect AES encryption keysC、TKIP encryption is more processor intensive than AES encryption isD、WPA requires TKIP encryption， whereas WPA2 supports AES encryptionE、WPA requires AES encryption， whereas WPA2 supports TKIP encryption
Which two statements regarding asymmetric key encryption are true？（）A、The same key is used for encryption and decryption.B、It is commonly used to create digital certificate signatures.C、It uses two keys： one for encryption and a different key for decryption.D、An attacker can decrypt data if the attacker captures the key used for encryption
Which two statements are true about encrypting RMAN backup？（）A、 The transparent encryption of backups uses the encryption walletB、 The database uses the same encryption key for every encrypted backupC、 The password encryption of backups only uses the password while creating and restoring backupD、 If transparent encryption is configured， you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups
Which two statements are true about encrypting RMAN backup?（） (Choose two.)A、The transparent encryption of backups uses the encryption walletB、The database uses the same encryption key for every encrypted backupC、The password encryption of backups only uses the password while creating and restoring backupD、If transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.
单选题You suspect that a hacker may be performing a MAC address flooding attack somewhere within the network. Which description correctly describes a MAC address flooding attack？（）AThe attacking device spoofs a source MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.BFrames with unique， invalid destination MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.CThe attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the destination address found in the Layer 2 frames sent by the valid network device.DThe attacking device crafts ARP replies intended for valid hosts. The MAC address of the attacking device then becomes the source address found in the Layer 2 frames sent by the valid network device.EThe attacking device spoofs a destination MAC address of a valid host currently in the CAM table. The switch then forwards frames destined for the valid host to the attacking device.FFrames with unique， invalid source MAC addresses flood the switch and exhaust CAM table space. The result is that new entries cannot be inserted because of the exhausted CAM table space， and traffic is subsequently flooded out all ports.GNone of the other alternatives apply
多选题Which two wireless encryption methods are based on the RC4 encryption algorithm?（）AWEPBCCKMCAESDTKIPECCMP
多选题Which two statements are true about encrypting RMAN backup?（）AThe transparent encryption of backups uses the encryption walletBThe database uses the same encryption key for every encrypted backupCThe password encryption of backups only uses the password while creating and restoring backupDIf transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.
多选题Which two statements regarding asymmetric key encryption are true？（）AThe same key is used for encryption and decryption.BIt is commonly used to create digital certificate signatures.CIt uses two keys： one for encryption and a different key for decryption.DAn attacker can decrypt data if the attacker captures the key used for encryption
单选题When two fire hose teams are attacking a fire they should（）.Ause different fire hose pressuresBuse fire hoses of different sizesCnot attack the fire from opposite sidesDnot wear protective clothing
多选题Which two statements are true about encrypting RMAN backup？（）AThe transparent encryption of backups uses the encryption walletBThe database uses the same encryption key for every encrypted backupCThe password encryption of backups only uses the password while creating and restoring backupDIf transparent encryption is configured， you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups
单选题Which algorithm was the first to be found suitable for both digital signing and encryption？（）AHMACBRSACMD5DSHA-1
单选题You have a firewall filter containing two terms applied in an inbound direction on a customer interface. You would like this filter to protect your network from a spoofed denial of service attack. What match criterion should be used in the first term of the filter？（）ASource TCP portBSource IP addressCDestination TCP portDDestination IP address
多选题Which two statements regarding symmetric key encryption are true?（） (Choose two.)AThe same key is used for encryption and decryption.BIt is commonly used to create digital certificate signatures.CIt uses two keys: one for encryption and a different key for decryption.DAn attacker can decrypt data if the attacker captures the key used for encryption.
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 uses the password while creating and restoring backupDIf transparent encryption is configured, you cannot use the SET ENCRYPTION BY PASSWORD command to make password-protected backups.