Thursday, October 16, 2014

Explain Network Model

Explain Network Model.

·    A peer-to-peer (P2P) network is created when two or more PCs are connected  and  share  resources  without  going  through  a  separate
server computer.
·    A P2P network can be an ad hoc connection—a couple of computers connected via a Universal Serial Bus to transfer files.
·    A P2P network also can be a permanent infrastructure that links a half-dozen computers in a small office over copper wires.
·    A P2P network can be a network on a much grander scale in which special protocols and applications set up direct relationships among
users over the Internet.
·  Peer-to-peer networks have many disadvantages:
o this system is not centralised, making administration difficult
o lack of security
o no link in the network is reliable
·  peer-to-peer architecture does have several advantages:
o reduced cost (the costs involved in such a network are hardware, cabling and maintenance )
o well tested simplicity
·    The  client/server  model  is  a  computing  model  that  acts  as  a distributed application which partitions tasks or workloads between the providers of a resource or service, called servers, and service requesters, called clients
·    A network architecture in which each computer or process on the network is either a client or a server.
·    Servers are powerful computers or processes dedicated to managing disk drives (file servers), printers (print servers), or network traffic
(network servers ).
·  Clients are PCs or workstations on which users run applications.
·    Clients rely on servers for resources, such as files, devices, and even processing power.
·  Another type  of  network architecture is  known  as  a  peer-to-peer
architecture because each node has equivalent responsibilities.
·    Both client/server and peer-to-peer architectures are widely used, and each has unique advantages and disadvantages.
·    Client-server     architectures     are     sometimes     called     two-tier architectures.

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