Basic concept of computer network

[Audio] "Hello everyone. Welcome to this presentation about the basic concepts of computer networks. Today we will be exploring the definition, types, devices, history, and functions of computer networks. So let's get going..

[Audio] Computer networking is a field of knowledge that has grown to be a crucial part of the tech world. It encompasses the connection of various computing devices allowing them to transfer and access data, files, memory and other resources. Such networks can be as simple as two computers in a single home or office, or as expansive as thousands of computers spread all over the world. They are the technology in so many connected devices, from laptops, to smartphones, and even to kitchen appliances. There is no doubt that computer networking has had a major influence on our way of life..

[Audio] Discussing the basic concept of computer networks, we have seen how computers are connected to each other and how information can be transferred between them. Network devices are used for this, relying on a system of rules called communication protocols. These protocols allow for the transmission of information over physical or wireless mediums..

[Audio] Explaining the different types of computer networks, there are generally 7 types: personal area network (PAN), Local area network (LAN), Wireless local area network (WLAN), metropolitian area network (MAN), wide area network (WAN), storage area network (SAN) and virtual private network (VPN). PAN, LAN and WLAN are mainly for providing network access within a home, office, or small group of buildings, such as a school. WAN connects multiple LANs and MANs together, often over long distances with the aid of different types of telecommunication links. SAN is designed to manage both the networked storage as well as the storage devices, while VPN gives a secure connection over a public or a private network..

[Audio] Computer networks are made up of several different types of devices, such as networking hardware like routers, switches, and hubs, and networking software like protocol suites and network architecture. Routers and switches allow data to be transferred from one point to another, while hubs connect multiple devices in one place. Protocol suites define how data is sent and received, and network architecture determines the layout of the network. All of these components play a key role in enabling communication over a network..

[Audio] ARPANET created the very first computer network back in 1969 to support their defense system, ultimately leading to the development of the internet. This network was the starting point for the internet we know today..

[Audio] ARPANET was the first stable, long-distance network of its kind, linking computers across the US. Funded by the United States Department of Defense's Advanced Research Projects Agency, it enabled computers to communicate with each other remotely. Over time, ARPANET grew and formed the backbone of the modern-day Internet..

[Audio] A hub is a device used to link multiple computers or other devices together in a network, the simplest and most affordable form of network connection. It functions as a common connection point for all devices connected to it, allowing them to share resources and data without having to connect directly to each other..

[Audio] Switch is an essential component of a computer network. It is a physical device which sits between two or more network segments, filtering and forwarding traffic (often referred to as frames) between the network segments. Configuration of the switch can provide different levels of functionality, including packet filtering, access control, and connection management. Furthermore, switches can be utilized to provide redundant connections and enhance network performance..

[Audio] Routers are essential components of computer networks, connecting different sub-networks together to allow efficient communication. They offer forwarding of packets between multiple networks, packet filtering, Quality of Service (QoS) and Network Address Translation (NAT). Routers also act as security measures, providing firewall functionality, making them vital components of a secure computer network..

Gateway. A gateway is a node (router)is a computer network a key stopping point for data on its way to learn..