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Computer networks have transformed the way we live, work, and communicate. Understanding the fundamental concepts of computer networks, including data transmission, network topology, and network protocols, is essential for designing, implementing, and managing modern networks.

: Simultaneous two-way communication (e.g., telephone calls). Modes of Transmission Serial Transmission Computer networks have transformed the way we live,

: Omnidirectional waves used for long-distance, multicast communications like Wi-Fi and cellular networks. including data transmission

Analysis of why signals degrade over distances due to Attenuation (loss of energy), Distortion (change in signal form), and Noise (unwanted external signals). Network Models and Layers and network protocols