What is LAN? Connecting two PCs for the purpose of sharing data and attached peripherals that mean, you have established a LAN (local area network). But the figure of computers connected within a LAN can be fixed and can be to a limit of several hundreds computer systems.
Today we made some little changes to our page in witch we added category Network Fundamentals under our most important category networking.
This is basicly the niche of this whole web page. This project introduces to you the functions, structure, components, architecture, and models of the Internet and other computer networks. It uses the TCP and OSI layer models to show the roles of protocols and services at the application, transport, data link, and physical layers. The mean and structure of IP addressing and the basics of Ethernet, media, and operations. This project will hopefully help you to understand and build simple LANs by using basic principles of performing basic configurations of our system devices such as routers and switches, cabling, and implementing IP addressing.
In hope that you will enjoy using our knowledge, all the best…
What is network? A computer network in simple form can be consisted on just two computers that are allied to share available resources as variety of hardware, files and to correspond with each other. But in broad sense, this network can enclose thousands of computers in it because running a big business in traditional way can be a difficult task without a network and that provides an easy way to be in touch and cooperate with employees too. That means computer’s networking is referred to the assemblage of various kinds of hardware components plus computer’s interconnection with the help of communications mediums. The key purpose of networking is to allow the sharing of an organization’s resources as well as information.
The term “network” is by and large referred to computer’s network that is encompassed different types of hardware and computers. The key reason of such set up is to have the transportation of data and communication lenience. Nowadays, versatile technologies are used in these systems which are generally included: wired equipment, wireless and exotic technologies.
But whenever you will think about the major threats that lurk towards these networking systems, the point of their security will first come to your mind. Commonly, two types of security are significant in order to prevent invasions from somewhere else to your system. And these security measures can be installed in the form of personal firewall and encryption systems. You can avoid potential security vulnerability to your network by putting in firewall while another renowned approach to secure your computers connection is by encrypting traffic at the top level in TCP/IP stack that is known as packet level encryption.
In short, networking endows with manifold benefits and these are file sharing, hardware sharing, computer’s mobility and internet connection sharing etc. Get advantage from these facilities if you are an owner of an institute or organization.
When you open a web page, all sorts of things will need to be done in the background before you get your shiny website on your screen.
We will see now what is happening in the networking system to make that possible.
TCP/IP protocol is what makes sending and receiving most of the data across the Internet possible. But how data packets know how to find us and how we know how to find the IP addresses of the web servers where these pages are saved?
Data will maybe not even take the same route in each direction. It can happen that when we send something, a request to the server, the packets will flow through one route and the server response towards our computer will take some other route.
The Internet is the biggest computer networking system. It knows in every moment how to find the best route to some device connected anywhere in-between all his nodes.
But how is this data transferred across the wires, fibres and air?
Data is divided into small packets. Every time we send a request towards a server, our request must firstly be divided into packets, most of the same size. Each of those packets needs an IP address of the destination to be written on it so that he can be routed through the network.
In order to find out what is the destination IP address of the server – (remember that we are typing an URL into the browser, usually we are not typing IP address into it) – your computer, before sending out all those packets, will contact public DNS server – domain name server, that will have the information about IP address to which packets must be forwarded in order to get to your URL-linked page.
Public DNS servers are set up into a hierarchical system that keeps the knowledge of IP addresses for all URLs (domain names) that are registered on the Internet. With this database, DNS is able to translate our request for the web page URL into the IP address of the server on which the web page is stored.