There are n numbers of users who use computer network and are located over the world. So to ensure, national and worldwide data communication, systems must be developed which are compatible to communicate with each other ISO has developed a standard. ISO stands for International organization of Standardization. This is called a model for Open System Interconnection (OSI) and is commonly known as OSI model.
The ISO-OSI model is a seven layer architecture. It defines seven layers or levels in a complete communication system. They are:
Application Layer, Presentation Layer, Session Layer, Transport Layer, Network Layer, Data link Layer, Physical Layer.
A programming language is a set of written symbols that instructs the computer hardware to perform specific tasks. Typically, programming language consists of a vocabulary.Read More
A Database is a collection of related data organized in a way that data can be easily accessed, managed and updated. Database can be software based or hardware based.Read More
Encryption is the process of translating plain text data (plaintext) into something that appears to be random and meaningless (ciphertext). Encryption algorithm is difficult.Read More