Types of local networks
There are two models of local area networks:
- network such as client-server.
These models determine the interaction of computers in a local area network. In an ad hoc network , all computers are equal to each other. With all the information in the system is distributed between individual computers. Any user can enable or disable access to the data stored on his computer.
Ad hoc network, a user working any computer resources available to all the other computers on the network. For example, sitting at a computer, you can edit files on another computer, print them on a printer connected to a third, run programs on the fourth.
The advantages of such a model of networking is easy to implement and saving material resources, as there is no need to buy expensive server. Despite the simplicity of implementation, this model has a number of drawbacks:
- Poor performance when a large number of connected computers;
- no single database;
- lack of a unified system of information security;
- dependence of the presence in the system of information on the state of the computer, ie If the computer is off, the data stored on it will be available.
Peer network model can be recommended for small organizations with the number of computers to 20 pcs.
In networks such as client-server , there is one (or more) of the main computers – servers. Servers are used to store all the information in the network, as well as its processing.As the advantages of such a model should be highlighted:
- high speed network;
- Having a single information base;
- Having a single security system.
However, this model has its drawbacks. The main disadvantage is that the cost of establishing a network of client-server is much higher due to the need to purchase a dedicated server. Also can be attributed to the shortcomings and the availability of additional demand for service personnel – the network administrator.