Network: Definition:
- A network is set of devices (nodes) connected by communication links (media)
- A node can be a computer, printer or other device capable of sending and/or receiving data
- Link connecting the devices are often called communication channels
- Most network use distributed processing.
Distributed Processing Networks use distributed processing in which a task divided among multiple computers. Separate computers handle a subset instead of a single machine responsible for all aspects of a process.
Performance Performance can be measured in terms of transit time, response time, number of users, type of transmission medium, and capabilities of the connected hardware and the efficiency of the software.
Transit time The time required for a message to travel from one device to another.
Response time The time spent between an inquiry and a response
Reliability It is measured by the frequency of failure and time required to recover from a failure.
Security Network security is protecting data from unauthorized access.
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