1 Introduction Computer Networks. 2 Motivation and Scope Computer networks and internets: an overview of concepts, terminology and technologies that form.

Slides:

Advertisements

Similar presentations

Review of Topology and Access Techniques / Switching Concepts BSAD 141 Dave Novak Sources: Network+ Guide to Networks, Dean 2013.

Advertisements

Eighth Edition by William Stallings

Layer 1 of the TCP/IP protocol stack: Network Access Layer (NAL). Functions, performed on the layer. МАС address in Ethernet networks. Layer 1 of the TCP/IP.

Chapter 7 Data Link Layer

Review of Topology and Access Techniques / Switching Concepts BSAD 141 Dave Novak Sources: Network+ Guide to Networks, Dean 2013.

Chapter 1 Data Communications and Networks - Overview Data Communications deals with the transmission of signals in a reliable and effective manner. Topics.

Spring 2000John Kristoff1 Introduction Computer Networks.

CS 582 / CMPE 481 Distributed Systems Communications.

Networking Theory (Part 1). Introduction Overview of the basic concepts of networking Also discusses essential topics of networking theory.

Spring 2000John Kristoff1 Introduction Computer Networks.

EE 4272Spring, 2003 EE4272: Computer Networks Instructor: Tricia Chigan Dept.: Elec. & Comp. Eng. Spring, 2003.

Introduction To Networking

EE 4272Spring, 2003 Protocols & Architecture A Protocol Architecture is the layered structure of hardware & software that supports the exchange of data.

04/26/2004CSCI 315 Operating Systems Design1 Computer Networks.

Data Communications Architecture Models. What is a Protocol? For two entities to communicate successfully, they must “speak the same language”. What is.

Understanding Networks. Objectives Compare client and network operating systems Learn about local area network technologies, including Ethernet, Token.

Review on Networking Technologies Linda Wu (CMPT )

ECS 152A 1. Introduction. A Communications Model Source —generates data to be transmitted Transmitter —Converts data into transmittable signals Transmission.

OSI Reference Model An overview. Standards and the internet International Organization for Standardization ISO 70’s.

Chapter 1: Computer Network Fundamentals Guide to Computer Network Security.

Chapter 1 NETWORKING BASICS.

1 K. Salah Module 1.0: Introduction Definition Communication Model Type of networks –WAN –MAN –LAN, WLAN –PAN, WPAN Networking Technologies Network Switching.

Network Technology CSE Network Technology CSE3020 Week 1.

 The Open Systems Interconnection model (OSI model) is a product of the Open Systems Interconnection effort at the International Organization for Standardization.

IP Network Basics. For Internal Use Only ▲ Internal Use Only ▲ Course Objectives Grasp the basic knowledge of network Understand network evolution history.

Computer Networks Lecture 1 & 2 Introduction and Layer Model Approach Lahore Leads University.

Information Technologies -- Computer Networks 林永松台灣大學資訊管理學系 (02)

Technology Guide 4 Telecommunication & Internet. Agenda Telecommunication terminology Communication media Network architecture concepts Enterprise networking.

Information Technology

1 Information Technology in Business: Telecommunications and Networks Chapter 6.

What is a Protocol A set of definitions and rules defining the method by which data is transferred between two or more entities or systems. The key elements.

1 Networks and Telecommunications. 2 Applying Telecommunications in Business TELECOMMUNICATIONS – the transmission of data between devices in different.

CSCI-235 Micro-Computer in Science The Network. © Prentice-Hall, Inc Communications  Communication is the process of sending and receiving messages 

Chapter 2 Communications Networks. Introduction Look at: –Telephony Networks (2.2) –OSI Reference Model(2.3) –The Internet (2.4) –Asynchronous Transfer.

1 Computer Networks DA Chapter 1-3 Introduction.

Chapter 6 Wide Area Networking Concepts, Architectures, & Services.

Management Information Systems, 4 th Edition 1 Chapter 6 Information Technology in Business: Telecommunications and Networks.

1 Review - OSI Model n OSI Reference Model u represents the communications process. u 7 layers: physical, data link, network, transport, session, presentation.

Department of Electronic Engineering City University of Hong Kong EE3900 Computer Networks Introduction Slide 1 A Communications Model Source: generates.

Distributed System MK- Networking and Internetworking Moh. Noor Al ‘Azam

Management Information Systems, 3 rd Edition Effy Oz 1 Chapter 6 Information Technology in Business: Telecommunications and Networks.

Infrastructure in Teleradiology CONTENT 1. Introduction 2. Overview of Data Communication 3. Local Area Network 4. Wide Area Network 5. Emerging Technology.

EEC4113 Data Communication & Multimedia System Chapter 1: Introduction by Muhazam Mustapha, September 2011.

TCOM 509 – Internet Protocols (TCP/IP) Lecture 03_b Protocol Layering Instructor: Dr. Li-Chuan Chen Date: 09/15/2003 Based in part upon slides of Prof.

UNDERSTANDING THE HOST-TO-HOST COMMUNICATIONS MODEL - OSI LAYER & TCP/IP MODEL 1.

1 CHAPTER 8 TELECOMMUNICATIONSANDNETWORKS. 2 TELECOMMUNICATIONS Telecommunications: Communication of all types of information, including digital data,

Networks. Common Xmit Media Shared Media Networks are a shared communication resource Only one user can access at a time.

CENG 490/510 Network Programming Russell Deaton Rm

Computer Security Workshops Networking 101. Reasons To Know Networking In Regard to Computer Security To understand the flow of information on the Internet.

Chapter 5 Network Computing. Agenda Functions Feasibility Analysis.

William Stallings Data and Computer Communications

Chapter 4 Telecommunications and Networking The McGraw-Hill Companies, Inc All rights reserved. Irwin/McGraw-Hill.

Communication Networks - Overview CSE 3213 – Fall November 2015.

Prof. Hosny Ibrahim.  Text book (TX1): Data and Computer Communications By: William Stalling, 11 th Edition 2011  Text book (TX2): Data Communications.

Department of Electronic Engineering City University of Hong Kong EE3900 Computer Networks Protocols and Architecture Slide 1 Use of Standard Protocols.

Ch 2. Network Models. 1. LAYERED TASKS Concept of layers – Consider two friends who communicate through mail – What happens when one sends a letter to.

نظام المحاضرات الالكترونينظام المحاضرات الالكتروني.

Networks are about Communication! What is a good model of communication?

CIS 321 – Fall 2004 Data Communications & Networking Chapter 1 - Introduction.

Network Models. The OSI Model Open Systems Interconnection (OSI). Developed by the International Organization for Standardization (ISO). Model for understanding.

Data Communications ผู้สอน : ผศ. ดร. ศักดิ์ชัย ทิพย์จักษุรัตน์ (2D/1) ผศ. ดร. อรฉัตร จิตต์โสภักตร์ (2D/2)

Computer Networks 0001-History, Standards Gergely Windisch

Managing Computer and Communication Networks

Data Transmission and Computer Communications ECE: 412

Introduction Computer Networks.

Chapter 1. Introduction Data Communications

EEC4113 Data Communication & Multimedia System Chapter 1: Introduction by Muhazam Mustapha, July 2010.

Computer Networks DA2402.

Part I. Overview of Data Communications and Networking

Presentation transcript:

1 Introduction Computer Networks

2 Motivation and Scope Computer networks and internets: an overview of concepts, terminology and technologies that form the basis for digital communication in private corporate networks the the global Internet.

3 Motivation for Networks Information Access Sharing of Resources Facilitate Communications

4 What a Network Includes Transmission hardware Special-purpose hardware devices interconnect transmission media control transmission run protocol software Protocol software encodes and formats data detects and corrects problems

5 What a Network Does Provides communication that is Reliable Fair Efficient From one application to another

6 What a Network Does [continued] Automatically detects and corrects Data corruption Data loss Duplication Out-of-order delivery Automatically finds optimal path from source to destination

7 Data Communication versus Networking With only two nodes, mostly EE issues. Ñ With more than two nodes, lot more issues!

8 Direction of Transmission Point to PointBroadcast

9 Network Topologies

10 Transmission Media Wireline String Garden Hose Copper Twisted Pair Coax Optical Fiber Wireless Sound Light and mirrors Infrared RF Microwave

11 Network Scope Local Area Network (LAN) Metropolitan Area Network (MAN) Wide Area Network (WAN)

12 Data Transmission Serial Parallel

13 Multiplexing

14 Communication Modes Simplex Half-duplex Full-duplex

15 Connection-oriented versus Connectionless Connection Setup Data Transfer Connection Termination Data Transfer

16 Circuit Switching versus Packet Switching Dedicated fixed bandwidth route fixed at setup idle capacity wasted network state Best Effort end-to-end control multiplexing technique re-route capability congestion problems

17 Examples Public Switched Telephone Network Internet Postal Service Train Car and highway system

18 Standards Hardware Software Protocols Advantages and Disadvantages Proprietary, De Facto, De Jure Standards Bodies IETF, IEEE, OSI, ANSI, ATM Forum, etc.

19 Protocols Rules, standards and etiquette Metric System English Dinner party Morse Code TCP/IP HTML

20 Layering

21 Headers, Data and Trailers

22 Encapsulation

23 ISO OSI Reference Model 7: Application Layer 6: Presentation Layer 5: Session Layer 4: Transport Layer 3: Network Layer 2: Data link Layer 1: Physical Layer

24 Interfaces and Services PDUs SDUs SAPs Peer communications Service Primitives etc... read Tanenbaum and 1.3.5

25 TCP/IP Model 5: Application Layer 4: Transport Layer 3: Network Layer 2: Data link Layer 1: Physical Layer

26 TCP/IP versus OSI "Rough consensus and running code Simplicity Time to market Availability

27 Network Classification Physical medium: copper, fiber, wireless Scope: LAN, MAN, WAN Topology: bus, star, ring, mesh Switching style: circuit, packet Application: voice, data, video Protocol: IP, OSI, Ethernet, ATM Transmission rate: 10Mb/s, Gigabit

28 Terms I (we) Often Use Frames: think data link layer Packets: think network layer Datagrams: think IP Segments: think TCP Cells: think ATM Layer : refer to reference models

29 The End-to-End Argument "End-to-End Arguments in System Design J.H. Saltzer, D.P. Reed, and D.D. Clark