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Computer Network MCQs - Computer Networks Basic
Computer Network MCQs - FTP - Computer Networks
Computer Network MCQs - SMTP - Computer Networks
Computer Network MCQs - HTTP - Computer Networks
Computer Network MCQs - TELNET - Computer Networks
Computer Network MCQs - Ethernet - Computer Networks
Computer Network MCQs - Multiplexing - Computer Networks
Computer Network MCQs - Cryptography - Computer Networks
Computer Network MCQs - Network Layer - Computer Networks
Computer Network MCQs - Physical Layer - Computer Networks
Computer Network MCQs - Data Link Layer - Computer Networks
Computer Network MCQs - Network Attacks - Computer Networks
Computer Network MCQs - Transport Layer- Computer Networks
Computer Network MCQs - Application Layer - Computer Networks
  1. In cryptography, what is cipher?
    2. A.
    algorithm for performing encryption and decryption
    B.
    encrypted message
    C.
    both (a) and (b)
    D.
    none of the mentioned

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  2. In asymmetric key cryptography, the private key is kept by:
    3. A.
    sender
    B.
    receiver
    C.
    sender and receiver
    D.
    all the connected devices to the network

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  3. Which one of the following algorithm is not used in asymmetric-key cryptography?
    4. A.
    RSA algorithm
    B.
    diffie-hellman algorithm
    C.
    electronic code book algorithm
    D.
    none of the mentioned

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  4. In cryptography, the order of the letters in a message is rearranged by:
    5. A.
    transpositional ciphers
    B.
    substitution ciphers
    C.
    both (a) and (b)
    D.
    none of the mentioned

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  5. What is data encryption standard (DES)?
    6. A.
    block cipher
    B.
    stream cipher
    C.
    bit cipher
    D.
    none of the mentioned

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  6. Cryptanalysis is used:
    7. A.
    to find some insecurity in a cryptographic scheme
    B.
    to increase the speed
    C.
    to encrypt the data
    D.
    none of the mentioned

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  7. Which one of the following is a cryptographic protocol used to secure HTTP connection?
    8. A.
    stream control transmission protocol (SCTP)
    B.
    transport layer security (TSL)
    C.
    explicit congestion notification (ECN)
    D.
    resource reservation protocol

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  8. Voice privacy in GSM cellular telephone protocol is provided by:
    9. A.
    A5/2 cipher
    B.
    b5/4 cipher
    C.
    b5/6 cipher
    D.
    b5/8 cipher

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  9. ElGamal encryption system is:
    10. A.
    symmetric key encryption algorithm
    B.
    asymmetric key encryption algorithm
    C.
    not an encryption algorithm
    D.
    none of the mentioned

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  10. Cryptographic hash function takes an arbitrary block of data and returns:
    11. A.
    fixed size bit string
    B.
    variable size bit string
    C.
    both (a) and (b)
    D.
    none of the mentioned

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