Transport Layer Protocols and Services
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Questions and Answers

What is demultiplexing in the context of the transport layer?

  • One source delivers items to multiple entities.
  • One entity delivers items to more than one source. (correct)
  • Multiple entities deliver items to one source.
  • Multiple sources deliver items to one entity.

    • What is the purpose of error control in the transport layer?

  • To make the transport layer reliable (correct)
  • To decrease network latency
  • To reduce network traffic
  • To increase network speed

    • What is a characteristic of the User Datagram Protocol (UDP)?

  • It is a connectionless, unreliable transport protocol. (correct)
  • It provides error control and correction.
  • It is a protocol used for file transfer.
  • It is a connection-oriented protocol.

    • What is the primary difference between a connectionless and a connection-oriented service?

    <p>The establishment of a connection before data transfer</p> Signup and view all the answers

    What is a common task performed by the transport layer?

    <p>Flow control and error control</p> Signup and view all the answers

    What is a feature of the Transmission Control Protocol (TCP)?

    <p>It is a connection-oriented, end-to-end reliable protocol.</p> Signup and view all the answers

    What type of communication does TCP provide?

    <p>Connection-oriented</p> Signup and view all the answers

    Which layer of the OSI model does TCP operate in?

    <p>Transport layer</p> Signup and view all the answers

    What is the purpose of TCP sequence numbers?

    <p>To reconstruct the data stream</p> Signup and view all the answers

    Why does TCP need sending and receiving buffers?

    <p>Because the sending and receiving rates may not match</p> Signup and view all the answers

    What is the term used to describe the imaginary connection between two TCP processes?

    <p>Tube</p> Signup and view all the answers

    What is the term used to describe the grouping of bytes into packets in TCP?

    <p>Segmentation</p> Signup and view all the answers

    What is the primary function of the transport layer in data networks?

    <p>Establishing process-to-process communication</p> Signup and view all the answers

    What is the purpose of well-known port numbers in TCP/IP?

    <p>To provide a universal address for servers</p> Signup and view all the answers

    What is the result of multiplexing in the transport layer?

    <p>An entity accepts items from more than one source</p> Signup and view all the answers

    What is the range of port numbers in TCP/IP?

    <p>Between 0 and 65,535</p> Signup and view all the answers

    What is the role of the transport layer in encapsulation and decapsulation?

    <p>To encapsulate and decapsulate messages</p> Signup and view all the answers

    What is the combination of an IP address and a port number called?

    <p>Socket address</p> Signup and view all the answers

    What is the minimum value of a port number in UDP?

    <p>0</p> Signup and view all the answers

    What is the purpose of the checksum field in a UDP packet?

    <p>To detect errors over the entire user datagram</p> Signup and view all the answers

    What is the length of the header in a UDP packet?

    <p>8 bytes</p> Signup and view all the answers

    How is the length of the data in a UDP packet calculated?

    <p>By subtracting the length of the header from the length of the packet</p> Signup and view all the answers

    What is the maximum value of a port number in UDP?

    <p>65,535</p> Signup and view all the answers

    What is the purpose of the length field in a UDP packet?

    <p>To define the total length of the user datagram</p> Signup and view all the answers

    What is the purpose of the acknowledgment mechanism in TCP?

    <p>To check the safe and sound arrival of data</p> Signup and view all the answers

    What is the range of the length of the TCP header in bytes?

    <p>20 to 60</p> Signup and view all the answers

    What is the purpose of the sequence number in the TCP segment?

    <p>To define the number assigned to the first byte of data contained in the segment</p> Signup and view all the answers

    What is the purpose of the window size field in the TCP segment?

    <p>To enable flow control</p> Signup and view all the answers

    How many bits are used to define the header length in the TCP segment?

    <p>4</p> Signup and view all the answers

    What is the purpose of the control field in the TCP segment?

    <p>To enable flow control, connection establishment and termination, connection abortion, and the mode of data transfer</p> Signup and view all the answers

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