Internet: Everything you need to know about
Internet, it is one of the things which most talk about, but a few understand. In this article, we take a heavy responsibility to give basic inside information about the internet in the simplest form possible, which almost anybody could understand.
In layman’s terms, the internet is a global network of computer networks. That didn’t help, did it? Actually, we first need to understand what a computer network is.
What is a computer network?
A computer network is an interconnection between several nodes. A node in a computer network is either an endpoint (end user of a data ex, laptops, smartphone, servers etc) or a redistribution point (retransmits data towards its destination, ex. Routers, switches etc). Nodes within a network can communicate with one another. These nodes send data to other nodes in terms of packets (unit of data having in communication). There is a specific protocol defining the structure of a packet and how they are shared among other nodes in a network.
Small networks can be combined to create a bigger network. These networks have an upper administrative authority which regulates them. An Autonomous System (AS) represents a single entity comprising of one or more networks (these networks has the AS as the administrative authority). Autonomous Systems don’t have any upper authority regulating them.
What is the internet?
The internet is a global network of interconnected Autonomous Systems. The Autonomous Systems connect voluntarily, without a central governing body, using Internet Protocol Suite. Internet Protocol Suite is a set of protocols, which defines how communication should occur between end nodes (sender and receiver).
Since the internet is a network of interconnected AS, we need some transmission medium to connect them. There are two basic types of transmission media.,
- Bounded: In a bounded or guided transmission media, the message is guided along a solid path. Examples are coaxial cable, twisted pair cable and fiber optics.
- Unbounded: In an unbounded or unguided transmission media the message is not guided along a fixed path, but is transmitted in the air. The signal propagates in the air until it is either received by a receiver or attenuates (losses signal strength). Examples are satellite and other radio communication.
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