Computer by S.Shrestha (comp 251)

Slides:

Advertisements

Similar presentations

Introduction to Computer Administration. Computer Network - Basic Concepts Computer Networks Computer Networks Communication Model Communication Model.

Advertisements

INTRODUCTION TO COMPUTER NETWORKS Zeeshan Abbas. Introduction to Computer Networks INTRODUCTION TO COMPUTER NETWORKS.

CSCI-235 Micro-Computers in Science The Network. Network Fundamentals A computer network consists of two or more computers linked together to exchange.

PYP002 Intro.to Computer Science Introduction to Networks1 Networks Chapter 17.

Shalini Bhavanam. Key words: Basic Definitions Classification of Networks Types of networks Network Topologies Network Models.

99 CHAPTER COMMUNICATIONS AND NETWORKS. © 2005 The McGraw-Hill Companies, Inc. All Rights Reserved. 9-2 Competencies Discuss connectivity, the wireless.

McGraw-Hill/Irwin Copyright © 2008 by The McGraw-Hill Companies, Inc. All rights reserved. Chapter 9 Communications and Networks.

EEC-484/584 Computer Networks Lecture 2 Wenbing Zhao

Basic Principles of Networking Basic Computer Concepts

1 Networking A computer network is a collection of computing devices that are connected in various ways in order to communicate and share resources. The.

INTRODUCTION TO COMPUTER NETWORKS INTRODUCTION Lecture # 1 (

A-Level Computing#BristolMet Session Objectives#12 MUST define the term data packet SHOULD describe packet switching and circuit switching COULD explain.

Introduction to Networking. Key Terms packet  envelope of data sent between computers server  provides services to the network client  requests actions.

Communications & Networks

Information Systems Today: Managing in the Digital World TB4-1 4 Technology Briefing Networking.

IT in Business Enterprise and Personal Communications Networks Lecture – 07.

Chapter 5 Networks Communicating and Sharing Resources

Chapter 3 The Basics of Networking

Computer Network By Tahir Saad. Introduction to computer networking Content : The definitions of networking Use of network Network classification.

What Is A Network A network is a group of computers interconnected with communication lines which allows users to share information and resources.

Networks A network is a collection of computers and devices connected together via communications devices and transmission media Advantages of a network.

Chapter 4 Computer Networks – Part 1

4343 X21 Network Hardware Tananbaum Ch X22 Outline Network taxonomy Network software.

Networks and Hackers Copyright © Texas Education Agency, All rights reserved. 1.

How the Internet Works. The Internet and the Web The Web is actually just one of many computer applications that run on the Internet Among others are.

Chapter 3 Fluency with Information Technology 4th edition

MCA-202 Computer Networks & Data Communication

Networked Information Systems 1 Advantages of and classified by their size & architecture or design.

Unit 1—Computer Basics Lesson 7 Networks.

Computers Are Your Future Tenth Edition Chapter 8: Networks: Communicating & Sharing Resources Copyright © 2009 Pearson Education, Inc. Publishing as Prentice.

Chi-Cheng Lin, Winona State University CS 313 Introduction to Computer Networking & Telecommunication Introduction – Part II.

Networking By Nachiket Agrawal 10DD Contents Network Stand Alone LAN Advantages and Disadvantages of LAN Advantages and Disadvantages of LAN Cabled LAN.

Living Online Module Lesson 23 — Networks and Telecommunication

Lecture 4 Title: Network Components and Types By: Mr Hashem Alaidaros MIS 101.

Introduction Chapter 1. Uses of Computer Networks Business Applications Home Applications Mobile Users Social Issues.

Networks CS105. What is a computer network? A computer network is a collection of computing devices that are connected in various ways so that they can.

Overview of computer communication and Networking Communication VS transmission Computer Network Types of networks Network Needs Standards.

Computer network  A network consists of multiple computers connected to each other to share data and resources.

Introduction to Information Systems Lecture 06 Telecommunications and Networks Business Value of Networks Jaeki Song.

What is H.323? H.323 is standard providing a foundation for audio, video, and data communications across IP-based networks, including the Internet.

 The devices which each intercorrect several computer or different to each other, each nones network devices.  There are various types of Network devices.

Distributed DBMSs- Concept and Design Jing Luo CS 157B Dr. Lee Fall, 2003.

1 ECE453 - Introduction to Computer Networks Lecture 1: Introduction.

Living Online Module Lesson 23 — Networks and Telecommunication Computer Literacy BASICS.

Introduction to Computer Networks Dr. Sanjay P. Ahuja, Ph.D FIS Distinguished Professor of Computer Science School of Computing, UNF.

Lecture 1: Major Networking Concepts: a Review Dr. Najla Al-Nabhan.

CSCI-235 Micro-Computer Applications The Network.

Introduction Chapter 1. Uses of Computer Networks Business Applications Home Applications Mobile Users Social Issues.

Introduction Chapter 1 Uses of Computer Networks Business Applications Home Applications Mobile Users Social Issues

INTERNET AND PROTOCOLS For more notes and topics visit: eITnotes.com.

Introduction Chapter 1. Uses of Computer Networks Business Applications Home Applications Mobile Users Social Issues.

Introduction Chapter 1. Computer network computer network, often simply referred to as a network, is a collection of hardware components and computers.

INTRODUCTION TO COMPUTER NETWORKING  Definition of computer network  Devices that could be connected to the network  Connection media  Resources shared.

COMPUTER NETWORKS Hwajung Lee. Image Source:

Introduction to Networks. When Personal Computers first appeared in business, software programs were designed for a single user. However as computers.

Introduction Chapter 1. Introduction  A computer network is two or more computers connected together so they can communicate with one another.  Two.

CSCI-100 Introduction to Computing The Network. Network Fundamentals A computer network consists of two or more computers linked together to exchange.

Introduction Chapter 1. Uses of Computer Networks Business Applications Home Applications Mobile Users Social Issues.

INTRODUCTION TO COMPUTER NETWORKS BY: SAIKUMAR III MSCS, Nalanda College.

INTRODUCTION TO COMPUTER NETWORKS

Chapter 1 Introduction.

Chapter 1 – Part 1 Introduction.

INTRODUCTION TO COMPUTER NETWORKS

Introduction to Computer Concept

INTRODUCTION TO COMPUTER NETWORKS

INTRODUCTION TO COMPUTER NETWORKS

Chapter Four: Network Hardware

Presentation transcript:

Computer by S.Shrestha (comp 251)

introduction Number of computers (and usually terminals (point of connection)) interconnected by one or more transmission paths. Transmission path often is the telephone line due to its convenience and universal by S.Shrestha (comp 251)

network transfer and exchange of data between the computers and by S.Shrestha (comp 251)

applications day-day transactions at department stores, banks, reservation counters, by S.Shrestha (comp 251)

advantages Sharing of resources. Allows flexible working environment. – Employees can work at home by using terminals tied through networks into the computer at the by S.Shrestha (comp 251)

Computer network Collection of autonomous (acting independently) computers interconnected by a single terminology. Two computers are said to be interconnected if they are able to exchange information. Note: Neither the internet nor the world wide web (distributed system) is a computer by S.Shrestha (comp 251)

internet Internet is not a single network but a network of networks and the web is a single distributed system that runs on top of the internet. Internet stands for international networks. Largest computer network system in the world. Global network of by S.Shrestha (comp 251)

History of by S.Shrestha (comp 251)

Client server by S.Shrestha (comp 251)

Description One can imagine a company’s information system as consisting of one or more databases and some no of employees who need to access them remotely. In this model, the data are stored on powerful computers called servers. Servers: often these are centrally housed and maintained by a system by S.Shrestha (comp 251)

Contd… In contrast, the employees have simpler machines, called clients on their desks with which they access remote data. For example to include in spreadsheets (i.e. computer program allowing manipulation and flexible retrieval of especially tabulated numerical by S.Shrestha (comp 251)

Working mechanism 2 processes are involved, one on the client machine and one on the server machine. Communication takes the form of the client process sending a message over the network to the server process. The client process, then waits for a reply by S.Shrestha (comp 251)

Contd… When the server process gets the request, it performs the requested work or looks up the requested data and sends back a by S.Shrestha (comp 251)

Network hardware 2 types of transmission terminology that are in wide spread use. Broadcast links Point-point by S.Shrestha (comp 251)

1. Broadcast networks Single communication channel that is shared by all the machines on the network. Short messages (packets) sent by any machine are received by all the others. An address field within the packet specifies the intended recipient. Upon arriving a packet, a machine checks the address by S.Shrestha (comp 251)

Contd… If the packet is intended for the receiving machine, that machine processes the packet. intended for some other machine Packet by S.Shrestha (comp 251)

broadcasting Addressing a packet to all destinations by using a special code in the address field. When a packet with this code is transmitted, it is received and processed by every machine on the by S.Shrestha (comp 251)

multicasting Some broadcast systems also support transmission to a subset of the by S.Shrestha (comp 251)

2. point-to-point Consists of every connections between individual pairs of machines. To go from source-destination a packet on this type of network may have to first visit one or more intermediate by S.Shrestha (comp 251)

unicasting Point-point transmission with one sender and one by S.Shrestha (comp 251)

internetwork Connection of two or more networks. Example: by S.Shrestha (comp 251)

Wireless networks Divided into 3 main categories: – System interconnection – Wireless LANs – Wireless by S.Shrestha (comp 251)

System interconnection – Short range wireless network. – System connection networks use master- slave. – System unit (master), mouse-keyboard (slave) Master tells slave what address to use, when they can broadcast, how long they can transmit, what frequencies they can use, and so by S.Shrestha (comp 251)

Wireless LANs System in which every computer has a radio modem and antenna with which it can communicate with other by S.Shrestha (comp 251)

Wireless WANs Bluetooth – No cables – No driver by S.Shrestha (comp 251)

Home networks Computers (desktop PC) TV, DVD, VCR, etc. Most homes already have networks installed like:- electricity, telephone, cable TV, water, by S.Shrestha (comp 251)