The client-server characteristic describes the relationship of cooperating programs in an application. The server component provides a function or service to one or many clients, which initiate requests for such services. Servers are classified by the services thy provide. For example , a web server serves web pages and a file server serves a computer files. A shared resource may be any of the server computers software and electronic components, from programs and data to processors and storage devices. The sharing of resources of a server constitutes a service.

A peer-to-peer network is designed around the notion of equal Peer nodes simultaneously functioning as both “clients” and “servers” to the other nodes on the network. This model of network arrangement differs from the client–server model where communication is usually to and from a central server. A typical example of a file transfer that uses the client-server model is the File Transfer Protocol(FTP) service in which the client and server programs are distinct: the clients initiate the transfer, and the servers satisfy these requests

Security Solutions Including Virus Protection.

There are different type of network attacks May take place mentioned below in active and passive category , Networks are subject to attacks from malicious sources. Attacks can be from two categories: “Passive” when a network intruder intercepts data traveling through the network, and “Active” in which an intruder initiates commands to disrupt the network’s normal operation.