_________ is another kind of fiber optic network with an active star for switching.

• A. S/net
• B. Sw/net
• C. Net/sw
• D. Fs/net

In cryptography, what is cipher?

• A. Algorithm for performing encryption and decryption
• B. Encrypted message
• C. Both algorithm for performing encryption and decryption and encrypted message
• D. Decrypted message

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

• A. Sender
• B. Receiver
• C. Sender and receiver
• D. All the connected devices to the network

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

• A. Rsa algorithm
• B. Diffie-hellman algorithm
• C. Electronic code book algorithm
• D. Dsa algorithm

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

• A. Transpositional ciphers
• B. Substitution ciphers
• C. Both transpositional ciphers and substitution ciphers
• D. Quadratic ciphers

What is data encryption standard (DES)?

• A. Block cipher
• B. Stream cipher
• C. Bit cipher
• D. Byte cipher

Cryptanalysis is used __________

• A. To find some insecurity in a cryptographic scheme
• B. To increase the speed
• C. To encrypt the data
• D. To make new ciphers

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

• A. Stream control transmission protocol (sctp)
• B. Transport layer security (tls)
• C. Explicit congestion notification (ecn)
• D. Resource reservation protocol

Voice privacy in GSM cellular telephone protocol is provided by _______

• A. A5/2 cipher
• B. B5/4 cipher
• C. B5/6 cipher
• D. B5/8 cipher

ElGamal encryption system is __________

• A. Symmetric key encryption algorithm
• B. Asymmetric key encryption algorithm
• C. Not an encryption algorithm
• D. Block cipher method