MODES IN THE PHYSICAL LAYER IN DCN
MODES IN THE PHYSICAL LAYER The direction of data flow between two communicating devices and how the communication channel is shared. The primary modes are simplex, half-duplex, and full-duplex. 1. Simplex Mode: - In simplex mode, communication occurs in one direction only, and it is unidirectional. One device is the sender, and the other is th…
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Digital Transmission in the physical layer in DCN
Digital Transmission in the physical layer Digital transmission converts digital data into signals suitable for transmission over a physical medium. Key aspects of digital transmission: 1. Digital Signals: - In digital transmission, data is represented as discrete, binary signals. These signals can take on two voltage levels, often re…
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PERFORMANCE IN THE PHYSICAL LAYER in DCN
PERFORMANCE IN THE PHYSICAL LAYER The performance of data communication in a network refers to how effectively and efficiently the physical medium facilitates the transmission of data between devices. Some key factors and metrics associated with the performance of the Physical Layer: 1. Data Rate (Bit Rate): the rate at which bits are transmitte…
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Impairments in the physical layer in DCN
Impairments in the physical layer Impairments a factors or conditions that degrade the quality of the signal during travel in the physical medium. Some common impairments in the physical layer include: 1. Attenuation: Attenuation is a reduction in signal strength in a medium(cable). Measured in decibels (dB). 2. Distortion: Distortion …
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INTRODUCTION OF THE PHYSICAL LAYER IN DCN
INTRODUCTION OF THE PHYSICAL LAYER The Physical Layer is the lowest layer in the OSI (Open Systems Interconnection) model. The main function is to establish and manage the physical connection between devices and transmit raw binary data over a physical medium. Some key functions of the physical layer: · Data encoding: Converting digit…
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