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Learn with Arjan KC - Digital Marketing Expert in NepalAuthor: Arjan KC - Digital Marketing Expert in Nepal
Learn with Arjan KC - Digital Marketing Expert in Nepal is your go-to podcast for deep dives into digital marketing, e-commerce, IT, e-governance, and beyond. Featuring recorded classes, insightful audio sessions, and discussions on topics like information systems and applications, this podcast is perfect for students, professionals, and enthusiasts eager to learn. Stay updated with the latest trends in digital marketing and technology while exploring Arjan KC's expert insights. Unlock the knowledge you need to excel in the digital agetune in and start learning today! Got feedback? Share it! Language: en Genres: Education Contact email: Get it Feed URL: Get it iTunes ID: Get it Trailer: |
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The Invisible Plumbing of the Internet
Friday, 30 January, 2026
A computer network is a system that connects multiple devices to share resources, data, and processing power, forming the backbone of modern global communication. This communication relies on three core elements: a sender, a transmission medium, and a receiver. Data can flow in several ways: in one direction only (simplex), in both directions but alternately (half-duplex), or in both directions simultaneously (full-duplex), which is essential for efficient computer interactions.The physical connection is made via transmission media, which includes wired options like twisted-pair cables, coaxial cables, and high-speed optical fibers, as well as wireless systems like terrestrial microwaves and communication satellites. Networks themselves are categorized by scale, from personal (PAN) and local (LAN) networks up to vast wide area networks (WANs) like the internet. These networks can be physically arranged in different topologies—such as star, ring, bus, or mesh—each balancing cost, reliability, and complexity.Central to network communication is the Internet Protocol (IP), which uses unique addresses to route data. The prevalent IPv4 system is being supplemented by IPv6 to overcome address limitations and improve service. An IP address not only identifies a device but also acts as a point for authentication, though it can be spoofed by attackers. Addresses are either fixed (static) or temporarily assigned (dynamic via DHCP). To protect these networks, organizations use security tools like firewalls to control traffic, IPSec to secure data at the network level, and VPNs to create encrypted tunnels over public infrastructure.
