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NETWORK BASICS

Network A system of interconnected computers and computerized peripherals such as printers is called computer network. This interconnection among computers facilitates information sharing among them. Computers may connect to each other by either wired or wireless media. A computer network consists of a collection of computers, printers and other equipment that is connected together so that they can communicate with each other.  


Network application
A Network application is any application running on one host and provides a communication to another application running on a different host, the application may use an existing application layer protocols such as: HTTP(e.g. the Browser and web server), SMTP(e.g. the email-client). And may be the application does not use any existing protocols and depends on the socket programming to communicate to another application. So the web application is a type of the network applications. 
There are lots of advantages from build up a network, but the th…

Network

A Network's Weakest Link May be Different Than you Think | Network ...
Network is a connection of two or more computers. Network allows the connected user to exchange data among themselves. The connections are setup by using a Cable media or Wireless media, depending upon the type of network. 

Computer networks support applications such as access to the World Wide Web, shared use of application and storage servers, printers, and fax machines, and use of email and instant messaging applications. 

 Different types of Network: The type of network is categorized in accordance to the coverage of the connections in that Network: 
LAN (Local area network) CAN (Campus area network) MAN (Metropolitan area network)  WAN (Wide area network) 

The Ins and Outs of Networking 
When it comes to networking, there are two essential pieces of equipment that enable numerous devices to be connected: routers and switches 

Switches  Switches are used in order to connect many devices on the same network. These devices are generally within the same building, such as an office building or school and could consist of various computers, printers, and other gadgets. The switch acts as a controller, allowing the connected objects to share information with one another. This not only increases productivity and efficiency, but also saves money. 

Routers 

In addition to switches, networks generally employ routers as well. These essential tools connect different networks to each other through the internet in order to allow for data exchange between networks. Whereas the switch can be considered a controller, a router should be considered more of a dispatcher, packaging digital information and choosing the best route for it to travel. Routers can feature several other functions, including firewalls and virtual private networks (VPNs) that enhance the security of the data being sent over the internet. 

Network Types 

There are countless types of networks available, especially as networking technologies continue to advance. Two of the most commonly employed networks are LAN and WAN. 

• Local Area Network (LAN): These networks are used to connect devices over relatively short distances, such as within a building, school, or home. LANs generally employ Ethernet cables as a means of connecting the various gadgets within the network.  

• Wide Area Network (WAN): These networks are used to connect devices over much larger distances than LANs. A WAN is established by using routers to connect various LANs and are generally not owned by a single person or organization. The internet is one massive WAN that spans the entire planet. 

• Other Network Types: Various other types of networks exist, including wireless local area networks (WLANs) that are LANs based on wireless network technology and metropolitan area networks (MANs) that cover larger areas than LANs but smaller areas than WANs. These MANs generally span a city and are owned and operated by a government or corporation. 

Types of Internet Connections 

Broadband Broadband internet connections provide high-speed internet that is always on and allows for more data to be transmitted than the traditional dial-up connections. Unlike dial-up services, it does not block phone lines and you do not have to reconnect to the network each time you log off. There are various types of broadband technologies, including digital subscriber line (DSL), cable modems, fibers, wireless broadband connections, and Satellite connections. The fastest of these connections is by far the fiber broadband, outperforming DSL and cable modems by ten to even hundreds of Mbps.  

Wi-Fi Wi-Fi is a play on the term Hi-Fi and represents a wireless internet connection. More specifically, it is a wireless local area network (WLAN) that allows devices to connect wirelessly to the internet. It utilizes 2.4 GHz and 5.0 GHz radio waves to connect Wi-Fi enabled gadgets (computers, gaming systems, mobile phones, and even some cameras) to the internet without the need for cumbersome wires. These connections can be extremely fast in some cases, reaching speeds of over 100 Mbps, but the convenience of having no cables and the increased speed come at a cost of potentially decreased security. Because there is no need for a physical connection, it is easier for hackers to compromise the security of Wi-Fi connections.  

Basic concept of Server: 

In information technology, a server is considered any instance of an application that can receive and serve the requests of other programs. Usually these applications are run on computers dedicated to acting solely as servers so that the heavy burden of fulfilling requests from other devices on the network does not overwhelm the computers. Running servers on dedicated computers is also a safety measure, helping to keep the server from being attacked. The computers dedicated to acting as servers usually include faster CPUs, bigger hard drives, better RAM, and multiple power sources. These enhancements allow the server to handle the immense workload and also give it reliability in the event of unfortunate events. 

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