From the course: Network Forensics

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Understanding computer networking

Understanding computer networking

From the course: Network Forensics

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Understanding computer networking

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- [Instructor] Networking connects computers, allowing applications running on them to communicate with each other and provide services to end users. We enjoy the benefits of networking by using email, cloud computing, and web content, just to name a few. Each network device needs a network interface card, or NIC, to transform data into electrical currents, pulses of light, or radio waves, depending on the medium used to transmit the signals. We use unshielded, twisted pair, or UTP, cables to send electrical currents, while fiber optics cables are used to send light pulses while the signals travel through the air. Operating systems, OSs, are crucial in converting data into signals. When a network application produces data to be transmitted like your email client generating a message to be sent, an OS adds multiple headers and trailers to the original message. The headers and trailers are similar to an envelope we use to send postal mail. As a mailing envelope requires physical mailing…

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