Cn Quiz-4 [IT-b]

10 Questions | Total Attempts: 316

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Cn Quiz-4 [IT-b] - Quiz


Questions and Answers
  • 1. 
    Regarding User Datagram Potocol (UDP), following is true
    • A. 

      It has fixed sized of header

    • B. 

      It is unreliable 

    • C. 

      Checksum is optional

    • D. 

      All the above 

  • 2. 
    The process on a host is identified by
    • A. 

      Sequence Number

    • B. 

      Process ID

    • C. 

      Port Number

    • D. 

      Host Name

  • 3. 
    The authority to assign and control well known ports is 
    • A. 

      IANA

    • B. 

      ISP

    • C. 

      ICANN

    • D. 

      IETF

  • 4. 
    In Go-Back-N protocol, if receiver get an error-free packet with sequence number not equal to Rn then it 
    • A. 

      Accepts the received packet and sends an ACK with acknowledgment number = Rn

    • B. 

      Just accepts the received packet

    • C. 

      Discards the received packet and sends an ACK with acknowledgment number = Rn

    • D. 

      None of the above

  • 5. 
    Read the following statements: (a) The port numbers ranging from 0 to 1,023 are assigned and controlled by ICANN. (b) Dynamic ports cannot be used as private port numbers (c) The port numbers ranging from 1024 to 49,151 are not controlled by ICANN. (d) Universal port numbers for servers are called well-known ports. Which of these statements are not correct?
    • A. 

      (a) and (c)

    • B. 

      (c) and (d)

    • C. 

      (b) only

    • D. 

      None of the above

  • 6. 
    In stop and wait protocol, if expected packet reaches at the receiver but is erroneous then
    • A. 

      Receiver simply discards the packet

    • B. 

      Receiver send NACK to sender

    • C. 

      Receiver detects and corrects the error

    • D. 

      Receiver sends ACK

  • 7. 
    In stop and wait protocol, maximum size of the send window is 
    • A. 

      2m-1

    • B. 

      1

    • C. 

      2

    • D. 

      2m

  • 8. 
    In UDP, checksum is computed over
    • A. 

      Entire UDP segment

    • B. 

      Only on UDP header and Data Coming from Application Layer

    • C. 

      Pseudo Header,  UDP Header and Data Coming from Application Layer

    • D. 

      Pseudo Header plus UDP header

  • 9. 
    Out-of-order delivery can be handled by 
    • A. 

      Stop-and-wait protocol

    • B. 

      Go-Back-N Protocol

    • C. 

      Simple Protocol 

    • D. 

      Selective Repeat Protocol

  • 10. 
    If a TCP connection is transferring a file of 1000 bytes. The first byte is numbered 10001. What is the sequence number of the segment if all data is sent in only one segment
    • A. 

      10000

    • B. 

      10001

    • C. 

      11001

    • D. 

      12001

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