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Peer-to-peer networks are good choices for needs of small organizations where the users are allocated in the same general area, security is not an issue and the organization and the network will have limited growth within the foreseeable future.The term Client/server refers to the concept of sharing the work involved in processing data between the client computer and the most powerful server computer.

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The development of standard networking protocols and media has resulted in worldwide proliferation of LANs throughout business and educational organizations.reference model has become an International standard and serves as a guide for networking.This model is the best known and most widely used guide to describe networking environments.There are two ways to create a VPN connection, by dialing an Internet service provider (ISP), or connecting directly to Internet.In peer-to-peer networking there are no dedicated servers or hierarchy among the computers.The entire function may execute in either the PC or server, or the function may be split between them.

This masking of application function locations enables system implementers to upgrade portions of a system over time with a minimum disruption of application operations, while protecting the investment in existing hardware and software.

VPN uses a technique known as tunneling to transfer data securely on the Internet to a remote access server on your workplace network.

Using a VPN helps you save money by using the public Internet instead of making long–distance phone calls to connect securely with your private network.

When a network becomes open sourced it can be managed properly with online collaboration software.

As companies rely on applications like electronic mail and database management for core business operations, computer networking becomes increasingly more important.

This is accomplished by connecting the different LANs using services such as dedicated leased phone lines, dial-up phone lines (both synchronous and asynchronous), satellite links, and data packet carrier services.