Computer Networks Lecture 7: Transport Layer and Network Layer Protocols
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Questions and Answers

What is the primary responsibility of the transport layer in computer networking?

  • Handling communication between routers in the network layer
  • Providing logical communication between application processes on different hosts (correct)
  • Physical transmission of data between end systems
  • Managing communication between the data link layer and the physical layer

    • Which protocol operates in a connection-oriented and reliable manner at the transport layer?

  • TCP (correct)
  • UDP
  • HTTP
  • IP

    • What are the main functionalities of the transport layer?

  • Data transmission between routers
  • Error detection and correction
  • Physical transmission of data between end systems
  • Multiplexing/demultiplexing, reliable data transfer, flow control, and congestion control (correct)

    • Which type of transport layer protocol is UDP?

    <p>Connectionless/unreliable</p> Signup and view all the answers

    What is the primary function of the network layer in computer networking?

    <p>Communication between hosts</p> Signup and view all the answers

    What is the main difference between connection-oriented and connectionless protocols?

    <p>Connection-oriented protocols establish a dedicated connection before transmitting data, while connectionless protocols do not require a dedicated connection.</p> Signup and view all the answers

    Which feature is specific to TCP and not available in UDP?

    <p>Congestion control</p> Signup and view all the answers

    What is the purpose of multiplexing at the sender's side?

    <p>To collect messages from multiple sockets and add transport headers for demultiplexing</p> Signup and view all the answers

    Which type of protocol uses a handshake process to establish a connection between devices?

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

    What is the main difference between TCP and UDP in terms of data transfer?

    <p>TCP provides reliable data transfer and in-order delivery, while UDP offers unreliable data transfer and unordered delivery.</p> Signup and view all the answers

    The transport layer is responsible for data transfer between hosts.

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

    TCP is a connectionless and unreliable transport protocol.

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

    Multiplexing and demultiplexing are functionalities of the transport layer.

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

    The network layer is responsible for reliable data transfer and flow control.

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

    UDP is a connection-oriented reliable transport protocol.

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

    Connection-oriented protocols transmit segments to the receiver in the same order the sender has sent them.

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

    Connectionless protocols establish a dedicated connection between devices before transmitting data.

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

    UDP provides reliable data transfer.

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

    Multiplexing at the sender's side involves collecting messages from multiple sockets and adding transport headers to be used later in demultiplexing.

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

    TCP and UDP both provide determined delay guarantees and security of data transfer.

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

    Study Notes

    Transport Layer Responsibilities

    • The primary responsibility of the transport layer is to ensure reliable data transfer between hosts.

    Transport Layer Protocols

    • TCP (Transmission Control Protocol) operates in a connection-oriented and reliable manner at the transport layer.
    • UDP (User Datagram Protocol) is a connectionless transport protocol.

    Transport Layer Functionalities

    • The main functionalities of the transport layer include multiplexing and demultiplexing.

    Connection-Oriented vs Connectionless Protocols

    • Connection-oriented protocols transmit segments to the receiver in the same order the sender has sent them, ensuring reliability and order.
    • Connectionless protocols do not establish a dedicated connection before transmitting data, and do not guarantee the order of segment receipt.

    TCP Specific Features

    • TCP uses a handshake process to establish a connection between devices.
    • TCP provides reliable data transfer, a feature not available in UDP.

    Multiplexing Purpose

    • The purpose of multiplexing at the sender's side is to collect messages from multiple sockets and add transport headers to be used later in demultiplexing.

    TCP vs UDP

    • The main difference between TCP and UDP in terms of data transfer is that TCP is connection-oriented and reliable, while UDP is connectionless and unreliable.

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    Description

    This quiz covers the content from Lecture 7 of the book 'Computer Networking: A Top Down Approach' by Jim Kurose and Keith Ross. It includes topics such as transport layer vs network layer, transport layer protocols, TCP vs UDP, multiplexing/demultiplexing, and checksum.

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