Network Architecture

~NETWORK ARCHITECTURE~

Way network are designed to communicate

	Peer-To-Peer Architecture	Client-Server Architecture
Definition	- A network model in which all computers can function as clients or servers as needed and there’s no centralized control over network resources. - Is a simple, inexpensive network that typically connects fewer than 10 computers - All computers in the network have equal capabilities to use the resources (hardware, software, data and files) available on the network.	- Network in which one or more computers act as a server, and the other computers (clients) on the network request services from the server. Server: -Provide services to client Client: -Requests services from a server computer. Also called as a workstation. Services: - Sharing hardware such as printers - control who can or can't have access to the network -Sharing internet connection
Advantage	Less start-up cost to setup the network architecture. – No need for a server. Easy to setup. – An operating system (OS) such as Windows XP already in place may only need to be reconfigured for peer-to-peer operations.	Centralized , Resources and data security are controlled through the server. Scalability , Any or all elements can be replaced individually as needs increase. Flexibility , New technology can be easily integrated into system. Interoperability , All the components (client/network/server) work together. Accessibility , Server can be accessed remotely and across multiple platforms
Disadvantage	Decentralized. – No central repository for files and applications Less security – Does not provide the security available on a client-server network. Lack of security controls.	Expense , Requires initial investment in dedicated server. Maintenance , Large networks will require a staff to ensure efficient operation. Dependence , When server goes down, operation will cease across the network.
Resources Access	Distributed among many desktop/client computers; makes access to resources more complex.	Centralized on one or more servers; streamlines access to resources.
Security	Users control their own shared resources and might have several sets of ID to access resources	Security is managed centrally and users have a single sets of ID for all shared resources.
Performance	Desktop OS not tuned for resources sharing.	Server OS tuned for resources sharing.
Cost	Initial costs lower.	Higher upfront costs because of dedicated hardware server OS and on-going costs for administrative support.

{NETWORK ARCHITECTURE} {NETWORK TOPOLOGY} {CLASSIFICATION OF NETWORK} {INTERNET} {INTERNET SERVICE}