David system is a network management system (nms). It is a packet of real - time applications (modules) that allows computer network to be controlled, monitored and managed through the Internet. There is only one condition that managed devices must provide. On each device an SNMP agent (Simple Network Management Protocol) must work. SNMP is the most popular management protocol in the Internet so that requirement shouldn't be difficult to provide. Typical devices that can be monitored are:

• IP routers,
• ATM switches,
• manageable ethernet switches,
• UPSes with a SNMP adapter,
• TV-SAT modems that allow IP devices to work in TV cable networks,
• computers.

One of the most important feature of David system is its architecture. It's built of high level configureable and independent from one another modules. This regule is a main base of the project. In consequences, the same modules may build different management system. Main features of David system are:

• general thinking in information flow controlling that come form high level independence of modules of the system,
• high level configureability of the system modules that allows a special configuration of David system to reach end-user expectations so close as it's only possible,
• the system scalability, so you can build up the system adding additional modules in very easy way; note that these modules needn't to be part of David system at all; adding another monitored devices to the system is a very easy procedure,
• using shell scripts in information processing is opportunity for modeling information and influence on processing it,
• all configuration files of David system, files with input/output data and log files are text files,
• using SNMPv1, SNMPv2C and SNMPv3 to communicate with monitored devices.