OSI Model: Physical Layer and Data Link Layer
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Questions and Answers

What is the function of the data link layer in the OSI model?

  • Encrypt the data before transmission
  • Prepare data for transmission and control how the data accesses the physical media (correct)
  • Receive signals across the connecting media
  • Control the physical media access only

    • What is the primary responsibility of the physical layer in a data network?

  • Ensuring secure connections between devices
  • Preparing data for transmission
  • Encoding the binary digits that represent data into signals for transmission (correct)
  • Routing data packets to their destination

    • Which types of connections are mentioned in the text?

  • Wired and wireless connections (correct)
  • Optical and satellite connections
  • Ethernet and Bluetooth connections
  • Fiber optic and coaxial connections

    • What do Network Interface Cards (NICs) do?

    <p>Connect a device to the network</p> Signup and view all the answers

    In the TCP/IP model, which two layers are closely tied according to the text?

    <p>Data link layer and physical layer</p> Signup and view all the answers

    What do switch devices and wireless access points have in common according to the text?

    <p>They are often two separate dedicated devices within a network implementation</p> Signup and view all the answers

    Which type of NIC would a network printer most likely have?

    <p>Ethernet NIC</p> Signup and view all the answers

    What happens at the Physical Layer of the OSI model?

    <p>It encodes a complete frame from the data link layer and transmits it.</p> Signup and view all the answers

    How are digital signals represented?

    <p>Discrete in nature, representing sequence of voltage pulses.</p> Signup and view all the answers

    What is one reason for signal deterioration as it travels through the medium?

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

    When data is sent over physical medium, what does it need to be converted into?

    <p>Electromagnetic signals</p> Signup and view all the answers

    What layer segments user data and places it into packets?

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

    Which layer encodes frames and creates the electrical, optical, or radio wave signals that represent the bits in each frame?

    <p>Physical Layer</p> Signup and view all the answers

    What happens to signals as they travel through the media?

    <p>They deteriorate due to attenuation, dispersion, and delay distortions.</p> Signup and view all the answers

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