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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...

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 ...

As the Internet is a network of networks, addressing, is particularly important. This section provides an initial overview of the addressing problems through the first generation IP protocol IPv4 and IPv6 new generation.Internet machines have an IPv4 address represented on a 32-bit integer. The address consists of two parts: a network identifier and an identifier of the machine to the network. There are four classes of addresses, each for encoding a different number of networks and machines: • Class A: 128 networks and 16,777,216 hosts (7 bits for networks and 24 for hosts); • Class B: 16,384 networks and 65,535 hosts (14 bit and 16 for networks for hosts); • Class C: 2,097,152 networks and 256 hosts (21 bits for networks and 8 for hosts); • Class D: group addresses (28 bits for the hosts belonging to the same group). These addresses are detailed in Figure.   The IP addresses were defin...

A proxy server is a dedicated computer or a software system running on a computer that acts as an intermediary between an endpoint device, such as a computer, and another server from which a user or client is requesting a service. The proxy server may exist in the same machine as a firewall server or it may be on a separate server, which forwards requests through the firewall. An advantage of a proxy server is that its cache can serve all users. If one or more Internet sites are frequently requested, these are likely to be in the proxy's cache, which will improve user response time. A proxy can also log its interactions, which can be helpful for troubleshooting. Here’s a simple example of how proxy servers work : When a proxy server receives a request for an Internet resource (such as a Web page), it looks in its local cache of previously pages. If it finds the page, it returns it to the user without needing to forward the request to the Internet. ...

In Computer network, a proxy server is a server (a computer system or an application program) that acts as an intermediary for requests from clients seeking resources from other servers. A client connects to the proxy server, requesting some service, such as a file, connection, web page, or other resource, available from a different server.   The proxy server evaluates the request according to its filtering rules. For example, it may filter traffic by IP address or protocol. If the request is validated by the filter, the proxy provides the resource by connecting to the relevant server and requesting the service on behalf of the client.   A proxy server may optionally alter the client's request or the server's response, and sometimes it may serve the request without contacting the specified server. In this case, it 'caches' responses from the remote server, and returns subse...