A Wide Area Network is a telecommunications or computer network that spreads across a large geographical location. It is usually made up of multiple Local Area Networks (LANs) that communicate to spread and process information. Corporations, governments, and individuals depend a lot on WANs for communication and transmission of data among citizens, workers, and subscribers . Let us examine components of a WAN : They are Routers , Switches, and Modems they shall be discussed below Routers (nodes) : Think of a relay race, the runners are the routers and the baton is the data. The router gets information from one LAN, reads it and decides the next LAN it should pass the data to within the WAN. Remember that a WAN is a network of LANs. It achieves this by using Internet Protocol (IP) Addresses. Switches: While the router passes on information the Switch decides the channel data it receives will take to its final destination. For LANs it uses the characteristic addresses of the devices connected to the network, and for WANs like the internet for instance it uses IP addresses of the incoming data to "make these decisions" WAN Standards WANs run inside the Open System Interconnection Model (OSI) .The OSI Model is a conceptual and logical layout that defines network communication used by systems open to interconnection and communication with other systems. The model is broken into seven sub components, or layers (www.techopedia.com) WANs operate using the first two of the seven layers viz the data link layer and the physical layer. The physical layer defines the electrical and physical specifications of the data connection. It defines the relationship between a device and a physical transmission medium. It is responsible for transmission and reception of disorganized raw data in a physical medium.
Search engines, social media sites , and E-Commerce sites are already being designed with Web 3.0 . These innovations in telecommunications hardware and software technology are indeed fascinating. The age of artificial intelligence draws near where machines capable
of deductive reasoning and drawing inferences will take over human interactions, from business decision making to medicine and so on . They would literally run our world .Hopefully there will not be wars and famine!