What is an OSI Model? Describe the functions of different layers of OSI Model. THE OSI MODEL International Standards Organization (ISO) specifications for network architecture, called the Open Systems Interconnect or OSI model. Seven-layered model, higher layers have more complex tasks. Each layer provides services for the next higher layer. Each layer communicates logically with […]

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What are the protocols? Describe different types of standards and standards organization with examples and internet standards. PROTOCOLS Set of rules that govern data communication or the way of communication. Protocols are the worker that performs the tasks. A protocol defines what is communicated, how it is communicated and when it is communicated.   STANDARDS […]

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What is the network topology? Describe different types of topologies & advantages and disadvantages with diagram.   NETWORK TOPOLOGY The physical layout of devices on a network. There are four basic topologies. 1. Mesh           2. Star              3. Bus              4. Ring   1. MESH TOPOLOGY: In Mesh topology every device has a dedicated point to […]

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DATA COMMUNICATION The exchange of data between two devices via some form of transmission medium such as wire cable etc.   TELE COMMUNICATION Tele is a Greek word for “Far”, so the Communication at a distance is known as Tele communication. It includes telephony, telegraphy and television.   Types of communication: Communication between two devices […]

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