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Vipin Chauhan
Vipin ChauhanLevel 30
Asked: March 30, 20222022-03-30T00:19:45+05:30 2022-03-30T00:19:45+05:30

What Are Two Reasons For Physical Layer Protocols To Use Frame Encoding Techniques? (Choose Two.)?

What Are Two Reasons For Physical Layer Protocols To Use Frame Encoding Techniques? (Choose Two.)?
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    1. Farwa Khalid Bronze
      2022-06-05T11:53:41+05:30Added an answer on June 5, 2022 at 11:53 am

      What Are Two Reasons for Physical Layer Protocols to Use Frame Encoding Techniques? (Choose two.)?

      Answer:

      • To provide better correction of an error in media
      • To indicate where the frame starts and end
      • Decrease the number of collisions in the media
      • Differentiate between the control bits and the data bits.
      • Enhance the media throughput

      The main two reasons for the physical layer to use the frame encoding technique are to provide better error correction in media and to differentiate between the control bits and the data bits. An encoding is responsible for the conversion of streams of bits into defined code that is recognizable to the receiver and the transmitter.

      Physical layer protocol:

      In the OSI model (open system interconnection) physical layer is the first and lowest layer in this model. It is also known as layer 1 responsible for bit-level transmission between different devices and also provides support to the mechanical and electrical interfaces connected to the physical medium for accompanied communication. For most of the network physical connections this layer is used, for example, cabling, connectors and types, wireless transmission, network interface cards, and cabling standards with types. This layer has nothing to do with a physical medium such as fiber and copper.

      Role of physical layer:

      Over the physical data link connected nodes of the network, this layer provides a way to transmit the streams of data bits. The bitstreams are gathered into symbols and converted to a physical signal that is transmitted over the medium. Electronic circuit transmission networks are present in the physical layer. It is a fundamental layer due to the high level of function in a network.  In the open system interconnection model from the data link layer physical layer translate the logical communications into hardware operations to cause the reception of electronic signals. Higher layers are supported by the physical layer that is responsible for the generation of logical data packets.

      Functions:

      • USB (universal serial bus):

      In the USB controller in the host physical chips are integrated to provide a bridge between the digital and the regulated parts of the interface.

      • Serial ATA:

      The physical layer is used by Serial ATA controllers.

      • Infrared data association:

      IrDA specification uses the IrPHY specification for the data transport.

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