Computer Tutorial Hub

The word 'server' refers to a specialized computer or hardware on which the server software works and provides services to other computers or clients. This article throws light on different types of servers available in the market, these days. A server has many functions, and they come in different types to facilitate different uses. Let's have a brief idea on what is a server before getting to know about the different types of servers. What is a Server A server is a device with a particular set of programs or protocols that provide various services, which other machines or clients request, to perform certain tasks. Together, a server and its clients form a client/server network, which provides routing systems and centralized access to information, resources, stored data, etc. At the most ground level, one can consider it as a technology solution that serves files, data, print, fax resources and multiple computers. The advanced server versions, like Wi...

7-layer OSI MODEL The OSI (Open System Interconnection) model is developed by ISO in 1984 to provide a reference model for the complex aspects related to network communication. It divides the different functions and services provided by network technology in 7 layers. This facilitates modular engineering, simplifies teaching and learning network technologies, helps to isolate problems, and allows vendors to focus on just the layer(s) in which their hardware or software is implemented and enables them to create products that are compatible, standardized, and interoperable. The diagram below shows the 7 layers of the OSI Model. To remember them in the correct order, a common mnemonic is often used: A ll P eople S eem T o N eed D ata P rocessing. Host A Host B ...

COLLISION DOMAIN As you may have read in our Media and Topologies TechNotes , collisions occur on Ethernet networks when multiple nodes on the 'network' put a signal on the wire at exactly the same time and collide with each other. In today's large-fast-growing-bandwidth-eating network environments, this can quickly become a serious problem. When more collisions occur, stations will have to wait longer before they can transmit data, decreasing performance for all nodes in the same collision domain. Networks can be separated in to multiple collisions domains by using the appropriate device. Where exactly the boundaries of a collision domain lie, will be made clear using a network diagram for each of the relevant network components below. BROADCAST DOMAIN ...

NETWORK TOPOLOGIES A logical topology depicts the route the signal takes on the network. A physical topology depicts how network devices are connected physically, the cabling. The 4 diagrams below represent the four topologies: Bus - Devices in a bus topology are connected to a central cable. In this type of network, both cable ends must be terminated. A defective cable segment, and changes and additions can affect the entire network. Star - Devices in a star topology are connected through a central hub. In this type of network, new nodes can be easily added making it easy to expand. Multiple connected star networks can form a large star or hiera...

NETWORKING Networking is connecting two or more devices to allow communication between them with the purpose of sharing information and resources. Examples of these devices are computers, printers, routers, hubs, modems, and PDAs. The information and resources being shared can be anything from MS Office documents and e-mail to printers and fax devices. Internetworking is connecting multiple networks with the purpose of creating one large network. The Internet is the most common example of an internetwork. Client/server vs Peer-to-peer Most of today's networks use the client/server model. In this model at least one computer acts as a server. Server...