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.
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
Firewalls are often categorized as either network firewalls or host-based firewall. Firewalls may also be a component of your computer's operating system.Read More
Transmission mode refers to the mechanism of transferring data between two devices connected over a network basically this process called Communication Mode.Read More