Computer Network Mcqs

Page No. 52

Voice privacy in GSM cellular telephone protocol is provided by _______


aA5/2 cipher


bb5/4 cipher


c b5/6 cipher


db5/8 cipher


View Answer A5/2 cipher

Which one of the following is a cryptographic protocol used to secure HTTP connection?


astream control transmission protocol (SCTP)


btransport layer security (TLS)


cexplicit congestion notification (ECN)


dresource reservation protocol



Cryptanalysis is used __________


ato find some insecurity in a cryptographic scheme


b to increase the speed


cto encrypt the data


dto make new ciphers



What is data encryption standard (DES)?


a block cipher


bstream cipher


cbit cipher


d byte cipher


View Answer block cipher

In cryptography, the order of the letters in a message is rearranged by __________


atranspositional ciphers


bsubstitution ciphers


c both transpositional ciphers and substitution ciphers


dquadratic ciphers



Which one of the following algorithm is not used in asymmetric-key cryptography?


a rsa algorithm


b diffie-hellman algorithm


celectronic code book algorithm


ddsa algorithm



In asymmetric key cryptography, the private key is kept by __________


a sender


b receiver


csender and receiver


dall the connected devices to the network


View Answer receiver

In cryptography, what is cipher?


aalgorithm for performing encryption and decryption


bencrypted message


cboth algorithm for performing encryption and decryption and encrypted message


ddecrypted message



In File Transfer Protocol, data transfer cannot be done in __________


astream mode


bblock mode


ccompressed mode


d message mode


View Answer message mode

In Active mode FTP, the client initiates both the control and data connections.


aTrue


b False


cA & B


dNone of these


View Answer False

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