Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Chapter 1 Introduction.

Slides:



Advertisements
Similar presentations
1 Network Concepts Rong Wang CGS3285 School of Computer Science University of Central Florida Spring2004.
Advertisements

Physical Structures Before discussing networks, we need to define some network attributes. Type of Connection 1- Point-to-Point 2- point-to-Multi point.
CSC 242 Introduction to Telecommunications Systems
Topology “The Topology is the geometric representation of the relationship of the links and linking devices” OR “Topology defines physical or logical arrangement.
What is a network? A network consists of two or more computers that are linked in order to share resources (such as printers and CD-ROMs) , exchange.
Chapter 2 Basic Concepts Line Configuration Topology Transmission Mode Categories of Networks Internetworks WCB/McGraw-Hill  The McGraw-Hill Companies,
1.1 Chapter 1 Introduction Lecture # 1 – 2 Ali Mustafa.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
McGraw-Hill©The McGraw-Hill Companies, Inc., 2004McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking PART.
Chapter 1. Introduction 1.#.
McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking UNIT I UNIT I.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
NETWORKING CONCEPTS. Data Communication Communication is for sharing information Sharing can be local or remote Local communication between individuals.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Data Communications, Kwangwoon University1-1 Data Communications 담당교수 : 정광수 교재 : Data Communications and Networking Behrouz.
1 Overview of Data Communication and Computer Networks : Data Communication and Computer Networks Asst. Prof. Chaiporn Jaikaeo, Ph.D.
ECOM 4314 Data Communications Fall September, 2010
INTRODUCTION T.Najah Al_Subaie Kingdom of Saudi Arabia Prince Norah bint Abdul Rahman University College of Computer Since and Information System NET331.
McGraw-Hill The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking PART I.
1.1 Chapter 1 Introduction HISTORY AND BACKGROUND  Networks used to be proprietary (software & hardware)  Technologies (components) were designed.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
6 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Lecturer: Tamanna Haque Nipa
McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking PART I.
UNIT -1. DATA COMMUNICATIONS The term telecommunication means communication at a distance. The word data refers to information presented in whatever form.
Chapter 1. Introduction 1.Data communications 2.Networks 3.The Internet 4.Protocols and standards.
Spring 2005Data Communications, Kwangwoon University1-1 Chapter 1. Introduction 1.Data communications 2.Networks 3.The Internet 4.Protocols and standards.
1.1 Introduction DATA COMMUNICATIONS The term telecommunication means communication at a distance. The word data refers to information presented.
Prof. Hosny Ibrahim.  Text book (TX1): Data and Computer Communications By: William Stalling, 11 th Edition 2011  Text book (TX2): Data Communications.
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Introduction to Computer Networks
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Data Communication Networks
Basic Concepts. Line Configuration Line Configuration Topology Topology Transmission Mode Transmission Mode Categories of Networks Categories of Networks.
1.1 Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
1/15 Chapter 4 IntroductionBy Mohammed Altaf Ahmed.
Chapter 1. Introduction. 1. DATA COMMUNICATIONS Telecommunication: communication at a distance Data: information presented in whatever form is agreed.
CSC339 Computer Communications & Networks Qaisar Javaid, Assistant Professor CIIT.
CIS 321 – Fall 2004 Data Communications & Networking Chapter 1 - Introduction.
McGraw-Hill©The McGraw-Hill Companies, Inc., 2000 Powerpoint Templates Computer Communication and Networks Lecture # 03 CS-3323 Muhammad Waseem Iqbal Data.
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Data Communications ผู้สอน : ผศ. ดร. ศักดิ์ชัย ทิพย์จักษุรัตน์ (2D/1) ผศ. ดร. อรฉัตร จิตต์โสภักตร์ (2D/2)
1 Kyung Hee University Prof. Choong Seon HONG Basic Concepts.
Data Communications. A. Overview 1.Introduction 2.Network Models B. PHYSICAL LAYER AND MEDIA 1.Data and Signals 2.Digital Transmission 3.Analog Transmission.
McGraw-Hill©The McGraw-Hill Companies, Inc., 2000 Data Comm. & Networks Instructor: Ibrahim Tariq.
McGraw-Hill©The McGraw-Hill Companies, Inc., 2004McGraw-Hill©The McGraw-Hill Companies, Inc., 2004 Overview of Data Communications and Networking PART.
Data Communications, Kwangwoon University
Introduction to Networking
Overview of Data Communications and Networking
Data Communication and Networking
2 Basic Concepts: data and computer networking
Chapter 1 Fundamental concepts of computer networks. Prepared by :
Overview of Data Communications and Networking
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Data Communication Chapter 1 Introduction 1.#.
Chapter 2: Basic Concepts
Chapter 1. Introduction 1.#.
Part I. Overview of Data Communications and Networking
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Chapter 1 Introduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1.#
Physical Topologies -K. M. THANVI
Presentation transcript:

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Chapter 1 Introduction Dr. Mznah Al-Rodhaan

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan 1-1 DATA COMMUNICATIONS The term telecommunication means communication at a distance. The word data refers to information presented in whatever form is agreed upon by the parties creating and using the data. Data communications are the exchange of data between two devices via some form of transmission medium such as a wire cable or wireless. 1.Delivery → Correct destination 2.Accuracy → Accurate data 3.Timelines → Real-time transmission 4.Jitter → Uneven delay

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Figure 1.1 Five components of data communication Components Data Representation Data Flow Topics discussed in this section: Components

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Data Representation 1.Text 2.Numbers 3.Images 4.Audio 5.Video Data flow  Simplex  Half-duplex  Full-duplex

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan 1-2 NETWORKS A network is a set of devices (nodes) connected by communication links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network. Distributed Processing Network Criteria (performance, reliability, and security) Physical Structures ( type of connections and topologies) Network Models ( Chapter 2) Categories of Networks ( LAN, MAN and WAN) Interconnection of Networks: Internet Topics discussed in this section:

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Types of connections Point to point A dedicated link is provided between two devices Multipoint More than two specific devices share a single link

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Physical Topology Tree

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan MESH Topology Every device has a dedicated point-to- point link to every other devices Dedicated Link carries traffic only between the two devices it connects A fully connected mesh network has n(n- 1)/2 physical channels to link n devices Every device on the network must have n-1 input/output (I/O) ports Advantage Less traffic, robust, secure, easy to maintain Disadvantage Need more resource (cable and ports), expensive n(n-1)/2 physical duplex links

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan STAR Topology Each device has a dedicated point-to-point link only to a central controller, usually called a hub. No direct traffic and link between devices Advantages Less expensive Easy to install and reconfigure Robustness Disadvantage Single point of failure

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan BUS Topology A multipoint topology All devices are linked through a backbone cable Nodes are connected to the bus cable by drop lines and taps. Drop line A connection running between the device and the main cable Tap A connector that either splices into the main cable or punctures the sheathing of a cable to create a contact with the metallic core Advantage: Ease of installation  Disadvantages: Difficult reconnection and fault isolation Broken or fault of the bus cable stops all transmission

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan RING Topology Each device is dedicated point-to-point connection only with the two devices on either side of it A signal is passed along the ring in the direction, from device to device, until it reaches its destination Each device in the ring incorporates a repeater Advantages Relatively easy to install and reconfigure Fault isolation is simplified Disadvantage Unidirectional traffic

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan Tree Topology Advantages: Point-to-point wiring for individual segments. Supported by several hardware and software venders. Disadvantages: Overall length of each segment is limited by the type of cabling used. If the backbone line breaks, the entire segment goes down. More difficult to configure and wire than other topologies. Tree topologies integrate multiple topologies together Example: Tree topology integrates multiple star topologies together onto a bus

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan A hybrid topology: a star backbone with three bus networks

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan An isolated LAN connecting 12 computers to a hub in a closet Categories of Networks 1.Local Area Network (LAN) 2.Wireless Local Area Network (WLAN) 3.Metropolitan Area Network (MAN) 4.Wide Area Network (WAN)

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan WANs: a switched WAN and a point-to-point WAN

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan A heterogeneous network made of four WANs and two LANs Interconnection of Networks: internet

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan 1-3 THE INTERNET The Internet has changed many aspects of our daily lives. It has affected the way we do business as well as the way we spend our leisure time. The Internet is a communication system that has brought a wealth of information to our fingertips and organized it for our use. A Brief History → ARPANET The Internet Today (ISPs) Topics discussed in this section:

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan 1-4 PROTOCOLS AND STANDARDS protocols and standards. Protocol is synonymous with rule. Standards are agreed-upon rules. Protocols Standards Standards Organizations Internet Standards Topics discussed in this section:

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan PROTOCOLS AND STANDARDS Protocols Syntax → format of the data Semantics → meaning of each section Timing → when data should be sent and how fast. Standards De facto → by fact (not approved as a standard) De jure → by Law (approved)

Based on Data Communications and Networking, 4 th Edition. by Behrouz A. Forouzan, McGraw-Hill Companies, Inc., 2007 Dr. Mznah Al-Rodhaan PROTOCOLS AND STANDARDS Standards Organizations International Organization for Standardization (ISO) International Telecommunication Union - Telecommunication Standards (ITU-T) American National Standards Institute (ANSI) Institute of Electrical and Electronics Engineers (IEEE) Electronic Industries Association (EIA)