Computer network fundamentals pdf

Application Layer with DNS, SMTP, FTP, POP, HTTP. Data communications refers to the transmission of this digital data between two or more computers and computer network fundamentals pdf computer network or data network is a telecommunications network that allows computers to exchange data. The physical connection between networked computing devices is established using either cable media or wireless media. The best-known computer network is the Internet.

Data Communication and Computer Network. This tutorial has been prepared for the computer science graduates to help them understand the basic to advanced concepts related to Data Communication and Computer Networking. After completing this tutorial you will find yourself at a moderate level of expertise in Data Communication and Computer Networking from where you can take yourself to next levels. Before you start proceeding with this tutorial, I’m making an assumption that you are already aware about basic computer concepts like what is keyboard, mouse, monitor, input, output, primary memory and secondary memory etc. Computer Fundamentals Tutorial for Beginners – Learn computer fundamental concepts in simple and easy steps starting from Overview, Applications, Generations, Types, Components, CPU, Input Devices, Output Devices, Memory, RAM, ROM, Motherboard, Memory Units, Ports, Hardware, Software, Number System, Number Conversion, Data, Networking, Operating System, Internet, Intranet, Buying, Courses. Computer, Fundamentals, Tutorial, Beginners, Overview, Applications, Generations, Types, Components, CPU, Input Devices, Output Devices, Memory, RAM, ROM, Motherboard, Memory Units, Ports, Hardware, Software, Number System, Number Conversion, Data, Networking, Operating System, Internet, Intranet, Buying, Courses. Computer – How to Buy?

This tutorial explains the foundational concepts of computer hardware, software, operating systems, peripherals, etc. This tutorial has been prepared for beginners as well as advanced learners who want to deal with computers. The tutorial is also very useful for undergraduate students of computer science, engineering, business administration, management, science, commerce and arts, where an introductory course on computers is a part of curriculum. After completing this tutorial, you will find yourself at a moderate level of expertise in the knowledge of computer basics from where you can take yourself to the next level. Knowledge of computers is not a prerequisite to follow the contents of this tutorial. This tutorial assumes no background in Computers or Computer programming.

This article is about monitoring of computer and network activity. The monitoring is often carried out covertly and may be completed by governments, corporations, criminal organizations, or individuals. It may or may not be legal and may or may not require authorization from a court or other independent government agencies. Computer and network surveillance programs are widespread today and almost all Internet traffic can be monitored.

There is far too much data gathered by these packet sniffers for human investigators to manually search through. Thus, automated Internet surveillance computers sift through the vast amount of intercepted Internet traffic, filtering out, and reporting to investigators those bits of information which are “interesting”, for example, the use of certain words or phrases, visiting certain types of web sites, or communicating via email or chat with a certain individual or group. The Internet’s rapid development has become a primary form of communication. More people are potentially subject to Internet surveillance. There are advantages and disadvantages to network monitoring. For instance, systems described as “Web 2. Tim O’ Reilly, who first explained the concept of “Web 2.