Eduguru

OSI AND TCP/IP MODEL OSI stands for Open System Interconnection is a reference model that describes how information from a software application in one computer moves through a physical medium to the software application in another computer. OSI consists of seven layers, and each layer performs a particular network function. OSI model was developed by … Read more

BASICS OF COMPUTER NETWORKING Networking is the convenient way of making information accessible to anyone, anytime & anywhere. A computer network, often simply referred to as a network, is a collection of computers and devices connected by communications channels that facilitates communications among users and allows users to share resources with other users. A computer … Read more

DATA COMMUNICATION BASICS Data Communications is the transfer of data or information between a source and a receiver. The source transmits the data and the receiver receives it. Data communication involved the following like communication networks, different communication services required, the kind of networks available, protocol architectures, OSI models, TCP/IP protocol models etc. Data Communication … Read more

OPERATING SYSTEM BASICS An Operating system is basically a intermediary agent between the user and the computer hardware. Manages the computer’s resources (hardware, abstract resources, software) It’s a resource allocator. It is also used to control programs to prevent errors and improper computer use. It is interrupt driven. Users and Processes access the Computer’s resources … Read more

IT SECURITY SERVICES LIFE CYCLE The IT security services life cycle provides IT security decision makers and managers with a six phase process by which they can select, implement, and manage IT security services. This Topic details the various life-cycle phases and the issues and decisions within each phase.  the security services life cycle has … Read more