The key lengths for DES and 3DES， respectively， are：（）A、 128 bits and 256 bitsB、 128 bits and 384 bitsC、 1024 bits and 3072bitsD、 64 bits and 192 bitsE、 56 bits and 168 bitsF、 128 bytes and 384 bytes
The key lengths for DES and 3DES， respectively， are：（）
- A、 128 bits and 256 bits
- B、 128 bits and 384 bits
- C、 1024 bits and 3072bits
- D、 64 bits and 192 bits
- E、 56 bits and 168 bits
- F、 128 bytes and 384 bytes
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Usually low key is used for emphasis and contrast; mid key indicates an expected, neutral attitude; and low key provides low information.（）
By default， what type of SSH server key is generated by Cisco NX-OS Software？（）A、 DSA key generated with 512 bitsB、 RSA key generated with 768 bitsC、 RSA key generated with 1024 bitsD、 DSA key generated with 1024 bitsE、 RSA key generated with 2048 bits
Which statement is true regarding a session key in the Diffie-Hellman key-exchange process?（）A、A session key value is exchanged across the network.B、A session key never passes across the network.C、A session key is used as the key for asymmetric data encryption.D、A session key is used as the key for symmetric data encryption.
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Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）A、In the DH key exchange process， the session key is never passed across the network.B、In the DH key exchange process， the public and private keys are mathematically related using the DH algorithm.C、In the DH key exchange process， the session key is passed across the network to the peer for confirmation.D、In the DH key exchange process， the public and private keys are not mathematically related， ensuring higher security
Which two statements are true about the primary key constraint in a table？ （）A、It is not possible to disable the primary key constraint.B、It is possible to have more than one primary key constraint in a single table.C、The primary key constraint can be referred by only one foreign key constraint.D、The primary key constraint can be imposed by combining more than one column.E、The non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.
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单选题By default， what type of SSH server key is generated by Cisco NX-OS Software？（）A DSA key generated with 512 bitsB RSA key generated with 768 bitsC RSA key generated with 1024 bitsD DSA key generated with 1024 bitsE RSA key generated with 2048 bits
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多选题DPM812错误H2（发KEY掉落失败）故障可能原因（）A落点处有KEY，KEY架起而没有压倒落点的传感器说明KEY盒尺寸超差，或发KEY档片未安装B落点处的KEY平整的置于通道内，说明落点处的传感器失灵C导向轴与轴套干或有异物D落点处无KEY说明发KEY推杆未推出KEY
单选题PKI是（）。APrivate Key InfrastructureBPublic Key InstituteCPublic Key Infrastructure公钥基础设施DPrivate Key Institute
单选题The key lengths for DES and 3DES， respectively， are：（）A 128 bits and 256 bitsB 128 bits and 384 bitsC 1024 bits and 3072bitsD 64 bits and 192 bitsE 56 bits and 168 bitsF 128 bytes and 384 bytes
单选题键盘事件的执行顺序是（）。AKey Press、Key Down、Key UpBKey Down、Key Press、Key UpCKey Up、Key Down、Key PressDKey Up、Key Press、Key Down
多选题Which two statements are true about the primary key constraint in a table？ （）AIt is not possible to disable the primary key constraint.BIt is possible to have more than one primary key constraint in a single table.CThe primary key constraint can be referred by only one foreign key constraint.DThe primary key constraint can be imposed by combining more than one column.EThe non-deferrable primary key constraint creates an unique index on the primary key column if it is not already indexed.
单选题Which statement is true regarding a session key in the Diffie-Hellman key-exchange process?（）AA session key value is exchanged across the network.BA session key never passes across the network.CA session key is used as the key for asymmetric data encryption.DA session key is used as the key for symmetric data encryption.
多选题Which two statements about the Diffie-Hellman （DH） key exchange process are correct？（）AIn the DH key exchange process， the session key is never passed across the network.BIn the DH key exchange process， the public and private keys are mathematically related using the DH algorithm.CIn the DH key exchange process， the session key is passed across the network to the peer for confirmation.DIn the DH key exchange process， the public and private keys are not mathematically related， ensuring higher security
多选题Which two statements about the Diffie-Hellman (DH) key exchange process are correct? （）(Choose two.)AIn the DH key exchange process, the session key is never passed across the network.BIn the DH key exchange process, the public and private keys are mathematically related using the DH algorithm.CIn the DH key exchange process, the session key is passed across the network to the peer for confirmation.DIn the DH key exchange process, the public and private keys are not mathematically related, ensuring higher security
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