ECE 4450:427/527 - Computer Networks Spring 2017
|
|
- Georgiana Watson
- 5 years ago
- Views:
Transcription
1 ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 2: Overview of Computer Network Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 1
2 Network Definition Definition: A system that carries a commodity between 2 or more entities via connections Entities: People, Computers, Cities etc. Connections: Relationships, Wires, Road etc. Examples of Network: Transportation Computer Many others Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 2
3 Computer Network Definition: A system that carries information between 2 or more entities, in the form of electric signals Commodity? Entities? Connections? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 3
4 Example: Transportation Vs Computer Network Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 4
5 Common Networks Ethernet (LAN) WiFi, WiMAX, 3G/4G: Mobile wireless network The Internet: Internet: Internetwork - interconnecting computer networks with special gateways or routers Largest communication network adopting IP technology Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 5
6 How Large is the Internet? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 6
7 How Popular is the Internet? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 7
8 Traffic of the Internet Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 8
9 Users of the Internet Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 9
10 Internet: Further Trend Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 10
11 Internet: Challenges Internet has grown rapidly and evolved to unprecedented size With a significant increase in the number of users, providers, and services, the Internet of the future is facing many problems: How to manage/design a very large system with limited resources Yet still provide a guaranteed performance Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 11
12 Objectives Not too ambitious in this course!!! We take things step by step to help you uunderstand communication network design principles And to pave an initial road for you to: Design/operate Comm. Network Design client/server software Design equipments Doing research Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 12
13 Nodes: Basic Elements of Network Divided into two main categories: Links: Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 13
14 What is Network Design A task to make connections among nodes via links so that packages can be exchanged: Timely, reliably Using as low resources as possible etc To this end, a huge of work required: We need to define 1) network connectivity; 2) network architecture; 3) protocols; 4) applications, 5) interfaces, 6) policies, usages. As said, we shall take the issues step by step. Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 14
15 Main Factors in Network Design What are the most important factors that drive Network Design? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 15
16 Applications Most people know about the Internet (a computer network) through applications World Wide Web Online Social Network Streaming Audio Video File Sharing Instant Messaging Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 16
17 Example of Application A multimedia application including video-conferencing Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 17
18 Network Performance When designing a network, we also need some tools to evaluate the design: Network Performance Metrics Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 18
19 Network Design A task to make connections among nodes via links so that packages can be exchanged: Timely, reliably Using as low resources as possible etc To this end, a huge of work required: We need to define 1) network connectivity; 2) network architecture; 3) protocols; 4) applications, 5) interfaces, 6) policies, usages. As said, we shall take the issues step by step. We now start with some Network Connectivity Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 19
20 Network Connectivity We have the following three main categories Directly-connected Network Circuit-switched Network Package-switched Network Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 20
21 Directly-connected Network Nodes are directly connected (a) Point-to-Point: Each node is directly connected to all others via a link (b) Multiple-Access: All nodes share the same physical medium Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 21
22 Disadvantages What are the main disadvantages of a network in which all nodes are directly connected? Given N nodes, how many connections do we need? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 22
23 Switched Network Fortunately, connection between 2 nodes does not necessary imply a physical connection: connection is achieved among a set of cooperating nodes Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 23
24 Interconnection of Networks Two nodes can also be connected by using a set of networks (or clouds): Form an internetwork or internet Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 24
25 Switched Network Circuit-Switched A dedicated circuit is established between two communicating nodes Example:? Packet-Switched Data is split into blocks called packets or messages. Store-and-forward strategy: Switches to store and forward packets Example:? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 25
26 Circuit-Switched Network Designed in 1878: reserve a dedicated channel for entire communication No need for a destination address since a path is already established Once communication is complete, connection is ended and links are released How many switches do we need? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 26
27 Circuit-Switched: Pros and Con? Interesting note: Circuit switching currently makes a comeback in optical networking Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 27
28 Packet-Switched Network Data is divided into packets Each packet can be delivered independently over the network Each packet contains identification info (source/destination address seq. number) Store-and-forward: Key strategy Each node receive complete package Store in memory Forward package to the next node Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 28
29 Advantages of Packet-Switched Efficiency in using resources, which is a key requirement of computer network Flexible multiplexing methods What is multiplexing? Service More connections of lesser quality No blocking of users Adaptation Can adapt to network congestion and failures Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 29
30 Disadvantages of Packet-Switched Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 30
31 Multiplexing Fundamental concept: resources are shared among user, e.g., data of users be multiplexed over links that make up network Two common methods: Time and Frequency Division Multiplexing Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 31
32 Statistical Multiplexing Shortcomings of TDM/FDM: If no data to send: Link is idle wasteful Maximum number of flows is fixed and known ahead of time not practical to add additional quanta/frequencies Statistical multiplexing: Division of the communication medium into channels of variable bandwidth: Resource allocated on demand rather than pre-allocated Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 32
33 Comparison Packet switching allows more users to use network! Example: 1 Mb/s link each user: 100 kb/s when active active 10% of time N users 1 Mbps link circuit-switching: 10 users packet switching: with 35 users, probability > 10 active at same time is less than.0004 Q: how did we get value ? Q: what happens if > 35 users? Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 33
34 More Detail Packet switching allows more users to use network! Assume there are total N users The probability for each user to be active is p Now we need to calculate two probabilities: What is the probability that we exactly n active users What is the probability that we have more than n active users Let start with some simple cases: N=3 and n=1 Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 34
35 Comparison Packet switching allows more users to use network! Example: 1 Mb/s link each user: 100 kb/s when active active 10% of time N users 1 Mbps link circuit-switching: 10 users packet switching: with 35 users, probability > 10 active at same time is less than.0004 More connections of lesser quality Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 35
36 Recap We have taken an overview about Network We also define CONNECTIVITY in a Network: Packet switching with statistical multiplexing Next step: We shall look at NETWORK ARCHITECTURE Layering Protocols Internet Architecture Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 36
A closer look at network structure:
T1: Introduction 1.1 What is computer network? Examples of computer network The Internet Network structure: edge and core 1.2 Why computer networks 1.3 The way networks work 1.4 Performance metrics: Delay,
More informationIntroduction to Wireless Networking ECE 401WN Spring 2008
Introduction to Wireless Networking ECE 401WN Spring 2008 Lecture 2: Communication Networks The first major topic we will study will be WLANs. But before that, we need to consider a few basics of networking.
More informationLecture 2: Internet Structure
Lecture 2: Internet Structure COMP 332, Spring 2018 Victoria Manfredi Acknowledgements: materials adapted from Computer Networking: A Top Down Approach 7 th edition: 1996-2016, J.F Kurose and K.W. Ross,
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 6.1: Internetworking Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer
More informationComputer Networks 2012/2013. Introduction part 1 (01) Dr. Tanir Ozcelebi. Thanks to A. Leon-Garcia & I. Widjaja, & I. Radovanovic & A. S.
Computer Networks 2012/20 Introduction part 1 (01) Dr. Thanks to A. Leon-Garcia & I. Widjaja, & I. Radovanovic & A. S. Tanenbaum System Architecture and Networking Group Outline What is the Internet? Why
More informationOutline: Connecting Many Computers
Outline: Connecting Many Computers Last lecture: sending data between two computers This lecture: link-level network protocols (from last lecture) sending data among many computers 1 Review: A simple point-to-point
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 5.4: Multiple Access Protocols Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527
More informationECE 4400:427/527 - Computer Networks Spring 2017
ECE 4400:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 3: Network Architectures Dr. Nghi Tran (ECE-University of Akron) ECE 4400:427/527
More informationComputer Networks. ENGG st Semester, 2010 Hayden Kwok-Hay So
Computer Networks ENGG1015 1 st Semester, 2010 Hayden Kwok-Hay So Where are we in the semester? High Level Applications Systems Digital Logic Image & Video Processing Computer & Embedded Systems Computer
More informationCCM 4300 Lecture 5 Computer Networks, Wireless and Mobile Communications. Dr Shahedur Rahman. Room: T115
CCM 4300 Lecture 5 Computer Networks, Wireless and Mobile Communications Dr Shahedur Rahman s.rahman@mdx.ac.uk Room: T115 1 Recap of Last Session Described the physical layer Analogue and Digital signal
More informationIslamic University of Gaza Faculty of Engineering Department of Computer Engineering ECOM 4021: Networks Discussion. Chapter 1.
Islamic University of Gaza Faculty of Engineering Department of Computer Engineering ECOM 4021: Networks Discussion Chapter 1 Foundation Eng. Haneen El-Masry February, 2014 A Computer Network A computer
More informationDigital Communication Networks
Digital Communication Networks MIT PROFESSIONAL INSTITUTE, 6.20s July 25-29, 2005 Professor Muriel Medard, MIT Professor, MIT Slide 1 Digital Communication Networks Introduction Slide 2 Course syllabus
More informationAnnouncements. TAs office hours: Mohamed Grissa: Mohamed Alkalbani:
Announcements TAs office hours: Mohamed Grissa: grissam@oregonstate.edu Tuesday: 4-5 Friday: 11-12 Mohamed Alkalbani: alkalbmo@oregonstate.edu Wednesday: 11-12 Thursday: 11-12 Lecture slides: Will be posted
More informationend systems, access networks, links circuit switching, packet switching, network structure
Chapter 1: roadmap 1.1 What is the Internet? 1.2 Network edge end systems, access networks, links 1.3 Network core circuit switching, packet switching, network structure 1.4 Delay, loss and throughput
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 5.5: Ethernet Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks
More informationLecture 2 Communication services The Trasport Layer. Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it
Lecture 2 Communication services The Trasport Layer Antonio Cianfrani DIET Department Networking Group netlab.uniroma1.it The structure edge: applications and hosts core: routers of s access s, media:
More informationData & Computer Communication
Basic Networking Concepts A network is a system of computers and other devices (such as printers and modems) that are connected in such a way that they can exchange data. A bridge is a device that connects
More informationRevision of Previous Lectures
Lecture 15 Overview Last Lecture Local area networking This Lecture Wide area networking 1 Source: chapters 8.1-8.3, 17.1, 18.1, 18.2 Next Lecture Wide area networking 2 Source: Chapter 20 COSC244 Lecture
More informationData Networks. Lecture 1: Introduction. September 4, 2008
Data Networks Lecture 1: Introduction September 4, 2008 Slide 1 Learning Objectives Fundamental aspects of network Design and Analysis: Architecture: layering, topology design, switching mechanisms Protocols:
More informationCSE3213 Computer Network I
CSE3213 Computer Network I Introduction Course page: http://www.cse.yorku.ca/course/3213 1 Course Contents 3 general areas: data communications, networking, and protocols 1. Data communications: basic
More informationModule 2 Overview of Computer Networks
Module 2 Overview of Computer Networks Networks and Communication Give me names of all employees Who earn more than $00,000 ISP intranet backbone satellite link desktop computer: server: network link:
More informationModule 2 Overview of. Computer Networks
Module Overview of Networks and Communication Give me names of all employees Who earn more than $00,000 ISP intranet backbone satellite link desktop computer: server: network link: CS454/654 - Issues How
More informationCS 3516: Computer Networks
Welcome to CS 3516: Computer Networks Prof. Yanhua Li Time: 9:00am 9:50am M, T, R, and F Location: AK219 Fall 2018 A-term 1 Some slides are originally from the course materials of the textbook Computer
More informationBROADBAND AND HIGH SPEED NETWORKS
BROADBAND AND HIGH SPEED NETWORKS SWITCHING A switch is a mechanism that allows us to interconnect links to form a larger network. A switch is a multi-input, multi-output device, which transfers packets
More informationIntroduction to the Internet
Introduction to the Internet CCST9015 8 th Sep, 2010 Dr. Hayden Kwok-Hay So Department of Electrical and Electronic Engineering 2 Internet in 2003 3 Internet Basics The Internet is a network that connects
More informationAnnouncements. CS 5565 Network Architecture and Protocols. Outline for today. The Internet: nuts and bolts view. The Internet: nuts and bolts view
Announcements CS 5565 Network Architecture and Protocols Lecture 2 Godmar Back Created Lectures Page Created CS5565 Forum Use this to find a project partner All projects will be done in groups of up to
More informationNetwork Connectivity and Mobility
Network Connectivity and Mobility BSAD 141 Dave Novak Topics Covered Lecture is structured based on the five elements of creating a connected world from the text book (with additional content) 1. Network
More informationToward a Reliable Data Transport Architecture for Optical Burst-Switched Networks
Toward a Reliable Data Transport Architecture for Optical Burst-Switched Networks Dr. Vinod Vokkarane Assistant Professor, Computer and Information Science Co-Director, Advanced Computer Networks Lab University
More informationCS 428/528 Computer Networks Lecture 01. Yan Wang
1 CS 428/528 Computer Lecture 01 Yan Wang 2 Motivation: Why bother? Explosive growth of networks 1989, 100,000 hosts on the Internet Distributed Applications and Systems E-mail, WWW, multimedia, distributed
More informationReview of Topology and Access Techniques / Switching Concepts
Review of Topology and s / Concepts BSAD 141 Dave Novak Sources: Network+ Guide to Networks, Dean 2013 Overview Three base wired topologies Bus, star, ring Two wireless topologies Ad-hoc, infrastructure
More information1. What is a Computer Network? interconnected collection of autonomous computers connected by a communication technology
Review Questions for exam Preparation (22-07-2017) 1. What is a Computer Network? interconnected collection of autonomous computers connected by a communication technology 2. What is the Internet? "network
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 5.1: Link Layer Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 5.6: Wireless Networks - MAC Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527
More informationIntroductions. Computer Networking Lecture 01. January 16, HKU SPACE Community College. HKU SPACE CC CN Lecture 01 1/36
Introductions Computer Networking Lecture 01 HKU SPACE Community College January 16, 2012 HKU SPACE CC CN Lecture 01 1/36 Outline What is a Computer Network? Basic Requirements of Building a Computer Network
More informationSwitching Networks (Fall 2010) EE 586 Communication and. August 30, Lecture 3. (modified by Cheung for EE586; based on K&R original) 1-1
EE 586 Communication and Switching Networks (Fall 2010) Lecture 3 August 30, 2010 (modified by Cheung for EE586; based on K&R original) 1-1 Announcements Read Chapter 1 Homework Small revision of the Wireshark
More informationLocal Area Networks (LANs): Packets, Frames and Technologies Gail Hopkins. Part 3: Packet Switching and. Network Technologies.
Part 3: Packet Switching and Gail Hopkins Local Area Networks (LANs): Packets, Frames and Technologies Gail Hopkins Introduction Circuit Switching vs. Packet Switching LANs and shared media Star, bus and
More informationInternet Architecture & Performance. What s the Internet: nuts and bolts view
Internet Architecture & Performance Internet, Connection, Protocols, Performance measurements What s the Internet: nuts and bolts view millions of connected computing devices: hosts, end systems pc s workstations,
More informationChapter 1. Uses of Computer Networks Network Hardware Network Software Reference Models Example Networks Network Standardization. Revised: August 2011
Introduction ti Chapter 1 Uses of Computer Networks Network Hardware Network Software Reference Models Example Networks Network Standardization Metric Units Revised: August 2011 Uses of Computer Networks
More informationCSEN 503 Introduction to Communication Networks
CSEN 503 Introduction to Communication Networks 1-1 Mervat AbuElkheir Hana Medhat Ayman Dayf ** Slides are attributed to J. F. Kurose People and Resources 1-2 Course Name Introduction to Communication
More informationOSI Network Layer. Network Fundamentals Chapter 5. Version Cisco Systems, Inc. All rights reserved. Cisco Public 1
OSI Network Layer Network Fundamentals Chapter 5 Version 4.0 1 Objectives Identify the role of the Network Layer, as it describes communication from one end device to another end device. Examine the most
More informationBasics of datacommunication
Data communication I Lecture 1 Course Introduction About the course Basics of datacommunication How is information transported between digital devices? Essential data communication protocols Insight into
More informationData and Computer Communications. Chapter 2 Protocol Architecture, TCP/IP, and Internet-Based Applications
Data and Computer Communications Chapter 2 Protocol Architecture, TCP/IP, and Internet-Based s 1 Need For Protocol Architecture data exchange can involve complex procedures better if task broken into subtasks
More informationCCM 4300 Lecture 2 Computer Networks: Wireless and Mobile Communication Systems. Dr Shahedur Rahman School of Science and Technology
CCM 4300 Lecture 2 Computer Networks: Wireless and Mobile Communication Systems Dr Shahedur Rahman School of Science and Technology 1 Recap of Last Session defined a computer network and identified some
More informationWe are going to see a basic definition of the devices you can find in a corporate wired network, so you can understand basic IT engineering jargon.
Computer network devices, also known as communication devices, are the backbone of a data communication network. In this category we can find routers, switches, hubs, LAN cards, gateways, modems, hardware
More informationIntroduction and Layered Network Architecture. EEE 538 Dr. Nail Akar Bilkent University Electrical and Electronics Engineering Department
Introduction and Layered Network Architecture EEE 538 Dr. Nail Akar Bilkent University Electrical and Electronics Engineering Department 1 Fundamental Aspects of Network Analysis Architecture Layering
More informationComputer Communication Networks
Contents ELL 785 Computer Communication Networks Introduction Lecture 1 Taxonomy of communication works Computer Communication Networks Building a work ed work architecture 1-1 Introduction PC server wireless
More informationComputer Networks and the internet. Daniel Graham Ph.D
Computer Networks and the internet Daniel Graham Ph.D 1.1 What Is the Internet? The Internet is a computer network that interconnects hundreds of millions of computing devices throughout the world. As
More informationAnnouncements Computer Networking. What is the Objective of the Internet? Today s Lecture
Announcements 15-441 15-441 Computer ing 15-641 Lecture 2 Protocol Stacks Peter Steenkiste Fall 2016 www.cs.cmu.edu/~prs/15-441-f16 Sign up for piazza: https://piazza.com/cmu/fall2016/15441641 P1 will
More informationNetwork Protocols and Architectures
Network Protocols and Architectures Introduction 1 What s the Internet: nuts and bolts view Millions of connected computing devices: hosts, end-systems PC s workstations, servers PDA s, phones, toasters
More informationCSCI Computer Networks
CSCI-1680 - Computer Networks Chen Avin (avin) Based partly on lecture notes by David Mazières, Phil Levis, John Jannotti, Peterson & Davie, Rodrigo Fonseca Administrivia Sign and hand in Collaboration
More informationModule 1. Introduction. Version 2, CSE IIT, Kharagpur
Module 1 Introduction Version 2, CSE IIT, Kharagpur Introduction In this module we shall highlight some of the basic aspects of computer networks in two lessons. In lesson 1.1 we shall start with the historical
More informationECE 4450:427/527 - Computer Networks Spring 2017
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Department of Electrical & Computer Engineering Lecture 6.2: IP Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks
More informationChapter 7. Telecommunications, the Internet, and Wireless Technology
Chapter 7 Telecommunications, the Internet, and Wireless Technology LEARNING OBJECTIVES What are the principal components of telecommunications networks and key networking technologies? What are the different
More informationData and Computer Communications Chapter 1 Data Communications, Data Networks, and the Internet
Data and Computer Communications Chapter 1 Data Communications, Data Networks, and the Internet Ninth Edition by William Stallings Data and Computer Communications, Ninth Edition by William Stallings,
More informationCS321: Computer Networks Introduction to Computer Networks and Internet
CS321: Computer Networks Introduction to Computer Networks and Internet Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in What is Data Communication? Data communications
More informationCS 716: Introduction to communication networks. - 8 th class; 17 th Aug Instructor: Sridhar Iyer IIT Bombay
CS 716: Introduction to communication networks - 8 th class; 17 th Aug 2011 Instructor: Sridhar Iyer IIT Bombay Key points to consider for MAC Types/Modes of communication: Although the medium is shared,
More informationECPE / COMP 177 Fall Some slides from Kurose and Ross, Computer Networking, 5 th Edition
ECPE / COMP 177 Fall 2014 Some slides from Kurose and Ross, Computer Networking, 5 th Edition Instructor: Dr. Jeff Shafer Email: jshafer at pacific dot edu Office: Anderson 205 Office hours (posted on
More informationCS455: Introduction to Distributed Systems [Spring 2018] Dept. Of Computer Science, Colorado State University
CS 455: INTRODUCTION TO DISTRIBUTED SYSTEMS [NETWORKING] Shrideep Pallickara Computer Science Colorado State University Frequently asked questions from the previous class survey Why not spawn processes
More informationReti di Calcolatori I
Reti di Calcolatori I Prof. Roberto Canonico Dipartimento di Ingegneria Elettrica e delle Tecnologie dell Informazione Corso di Laurea in Ingegneria delle Telecomunicazioni Corso di Laurea in Ingegneria
More informationIP Packet Switching. Goals of Todayʼs Lecture. Simple Network: Nodes and a Link. Connectivity Links and nodes Circuit switching Packet switching
IP Packet Switching CS 375: Computer Networks Dr. Thomas C. Bressoud Goals of Todayʼs Lecture Connectivity Links and nodes Circuit switching Packet switching IP service model Best-effort packet delivery
More informationKing Fahd University of Petroleum & Minerals Computer Engineering g Dept
King Fahd University of Petroleum & Minerals Computer Engineering g Dept COE 540 Computer Networks Term 121 Dr. Ashraf S. Hasan Mahmoud Rm 22-420 Ext. 1724 Email: ashraf@kfupm.edu.sa 9/1/2012 Dr. Ashraf
More informationChapter 1: Introduction
EE4272: Computer Networks Chapter 1: Introduction Instructor: Tricia Chigan Dept.: Elec. & Comp. Eng. 1) Data Communications: Deals with the transmission of signals in a reliable & efficient manner. Topics:
More informationPrepared by Agha Mohammad Haidari Network Manager ICT Directorate Ministry of Communication & IT
Network Basics Prepared by Agha Mohammad Haidari Network Manager ICT Directorate Ministry of Communication & IT E-mail :Agha.m@mcit.gov.af Cell:0700148122 After this lesson,you will be able to : Define
More informationClass X Subject : IT (Vocational) Chapter -1 Ouestion / Answer
Class X Subject : IT (Vocational) Chapter -1 Ouestion / Answer Q1 What is a computer network? A computer network, often simply referred to as a network, is a collection of computers and other hardware
More informationPart 1: Introduction. Goal: Review of how the Internet works Overview
Part 1: Introduction Goal: Review of how the Internet works Overview Get context Get overview, feel of the Internet Application layer protocols and addressing Network layer / Routing Link layer / Example
More informationCSCD 433/533 Advanced Networks
CSCD 433/533 Advanced Networks Lecture 2 Network Review Winter 2017 Reading: Chapter 1 1 Topics Network Topics Some Review from CSCD330 Applications Common Services Architecture OSI Model AS and Routing
More informationECE 650 Systems Programming & Engineering. Spring 2018
ECE 650 Systems Programming & Engineering Spring 2018 Networking Introduction Tyler Bletsch Duke University Slides are adapted from Brian Rogers (Duke) Computer Networking A background of important areas
More informationInternetworking Part 1
CMPE 344 Computer Networks Spring 2012 Internetworking Part 1 Reading: Peterson and Davie, 3.1 22/03/2012 1 Not all networks are directly connected Limit to how many hosts can be attached Point-to-point:
More informationNext Steps Spring 2011 Lecture #18. Multi-hop Networks. Network Reliability. Have: digital point-to-point. Want: many interconnected points
Next Steps Have: digital point-to-point We ve worked on link signaling, reliability, sharing Want: many interconnected points 6.02 Spring 2011 Lecture #18 multi-hop networks: design criteria network topologies
More informationNetworks: Communicating and Sharing Resources
Networks: Communicating and Sharing Resources 1 Network Fundamentals Networks o Links multiple computer systems and enables them to share data and resources o Types of computer networks: Local area network
More informationFundamentals of Information Systems, Seventh Edition
Fundamentals of Information Systems, Seventh Edition Chapter 4 Telecommunications, the Internet, Intranets, and Extranets Fundamentals of Information Systems, Seventh Edition 1 An Overview of Telecommunications
More informationCOMS Introduction to Computers. Networking
COMS 1001 Introduction to Computers Networking What's Ahead Networking layers Network Speeds Protocols, sockets, client/server Routing, DNS, Ethernet, LANs, wireless What is a Network? Loose definition:
More informationIntroduction. Introduction to Network Communications G64INC. Lectures. Related Modules. Assessment. Objectives
Introduction to Network Communications G64INC Dr. Gail Hopkins Introduction Practical matters Module goals, structure and contents Initial introduction to some key ideas and issues Lectures Two lectures
More informationRouter Router Microprocessor controlled traffic direction home router DSL modem Computer Enterprise routers Core routers
Router Router is a Microprocessor controlled device that forwards data packets across the computer network. It is used to connect two or more data lines from different net works. The function of the router
More information31270 Networking Essentials Focus, Pre-Quiz, and Sample Exam Answers
31270 Networking Essentials Focus, Pre-Quiz, and Sample Exam Answers CONTENTS Focus Questions... 2 Chapter 1: Explore the Network... 2 Chapter 2: Configure a Network Operating System... 5 Chapter 3: Network
More informationKIBABII UNIVERSITY COLLEGE DEPARTMENT COMPUTER SCIENCE & IT ANSWER ALL QUESTIONS IN SECTION A AND ANY TWO QUESTIONS IN SECTION B
KIBABII UNIVERSITY COLLEGE DEPARTMENT COMPUTER SCIENCE & IT TITLE: DATACOMMUNICATION COURSE CODE: 223 SECTION A: 30 Marks ANSWER ALL QUESTIONS IN SECTION A AND ANY TWO QUESTIONS IN SECTION B TIME ALLOWED:
More informationPART IV. Internetworking Using TCP/IP
PART IV Internetworking Using TCP/IP Internet architecture, addressing, binding, encapsulation, and protocols in the TCP/IP suite Chapters 20 Internetworking: Concepts, Architecture, and Protocols 21 IP:
More informationLecture (03) Circuit switching
Agenda Lecture (03) Circuit switching Switched communication network Circuit switching technology Dr. Ahmed ElShafee ١ Dr. Ahmed ElShafee, ACU Fall 2011, Networks I ٢ Dr. Ahmed ElShafee, ACU Fall 2011,
More informationNeed For Protocol Architecture
Chapter 2 CS420/520 Axel Krings Page 1 Need For Protocol Architecture E.g. File transfer Source must activate communications path or inform network of destination Source must check destination is prepared
More informationNeed For Protocol Architecture
Chapter 2 CS420/520 Axel Krings Page 1 Need For Protocol Architecture E.g. File transfer Source must activate communications path or inform network of destination Source must check destination is prepared
More information1. The Internet 2. Principles 3. Ethernet 4. WiFi 5. Routing 6. Internetworking 7. Transport 8. Models 9. WiMAX & LTE 10. QoS 11. Physical Layer 12.
Lecture Slides 1. The Internet 2. Principles 3. Ethernet 4. WiFi 5. Routing 6. Internetworking 7. Transport 8. Models 9. WiMAX & LTE 10. QoS 11. Physical Layer 12. Additional Topics 1.1. Basic Operations
More informationend systems, access networks, links 1.3 network core
Chapter 1: roadmap 1.1 what is the Inter? 1.2 work edge end systems, works, links 1.3 work core packet switching, circuit switching, work structure 1.4 delay, loss, throughput in works 1.5 protocol layers,
More informationNetworks and Distributed Systems. Sarah Diesburg Operating Systems CS 3430
Networks and Distributed Systems Sarah Diesburg Operating Systems CS 3430 Technology Trends Decade Technology $ per machine Sales volume Users per machine 50s $10M 100 1000s 60s Mainframe $1M 10K 100s
More informationLecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee
Agenda Lecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee Packet switching technique Packet switching protocol layers (X.25) Frame Relay ١ Dr. Ahmed ElShafee, ACU Fall 2011,
More informationLecture (04 & 05) Packet switching & Frame Relay techniques
Lecture (04 & 05) Packet switching & Frame Relay techniques Dr. Ahmed ElShafee ١ Dr. Ahmed ElShafee, ACU Fall 2011, Networks I Agenda Packet switching technique Packet switching protocol layers (X.25)
More informationIntroduction to Computer Networks INTRODUCTION TO COMPUTER NETWORKS
INTRODUCTION TO COMPUTER NETWORKS Computer Networks Computer network connects two or more autonomous computers. The computers can be geographically located anywhere. LAN, MAN & WAN Network in small geographical
More informationECE 4450:427/527 - Computer Networks
ECE 4450:427/527 - Computer Networks Spring 2017 Dr. Nghi Tran Lecture 1: Introduction Dr. Nghi Tran (ECE-University of Akron) ECE 4450:427/527 Computer Networks 1 / 16 Outline 1 Information 2 Broad Overview
More informationECS 15; Lectures 17 and 18. The Internet. What is the internet, and how does it work? TA feedback
ECS 15; Lectures 17 and 18 The Internet What is the internet, and how does it work? TA feedback Python -- Run your code!! Term paper: Start a paragraph with the point of the paragraph, not in modern times
More informationPPP. Point-to-Point Protocol
PPP Point-to-Point Protocol 1 Introduction One of the most common types of WAN connection is the point-to-point connection. Point-to-point connections are used to connect LANs to service provider WANs,
More information2 Network Basics. types of communication service. how communication services are implemented. network performance measures. switching.
2 Network Basics types of communication service how communication services are implemented switching multiplexing network performance measures 1 2.1 Types of service in a layered network architecture connection-oriented:
More informationSince enrollment is very small this semester, we have flexibilty. Traditional lecture Assigned reading, and then student(s) present during class time
Syllabus You can go to cs.rpi.edu and then Faculty and my website from my profile Or you can go to www.cs.rpi.edu/~holzbh Or to be very direct, you can go to www.cs.rpi.edu/~holzbh/ccn18/index.php 1 Textbook
More informationCommunication Networks - 3 general areas: data communications, networking, protocols
Communication Networks - Overview CSE 3213 Fall 2011 1 7 September 2011 Course Content 3 general areas: data communications, networking, protocols 1. Data communications: basic concepts of digital communications
More informationChapter 1: Introduction
Chapter 1: Introduction Our goal: get context, overview, feel of networking more depth, detail later in course approach: descriptive use Internet as example Overview: what s the Internet what s a protocol?
More informationENSC 427: COMMUNICATION NETWORKS (Spring 2011) Final Report
ENSC 427: COMMUNICATION NETWORKS (Spring 2011) Final Report Video Streaming over the 802.11g WLAN Technologies http://www.sfu.ca/~zxa7/ Zhenpeng Xue 301062408 zxa7@sfu.ca Page 2 of 16 Table of Contents
More informationLecture 2. Computer Networks Models. Network Models 1-1
Lecture 2 Computer Networks Models Network Models 1-1 Agenda Introduction to the Internet Reference Models for Computer Networks The OSI Model The TCP/IP Model Network Models 1-2 Announcements Bonus -
More informationIntroduction to WAN Technologies
Introduction to WAN Technologies From DocWiki This article introduces the various protocols and technologies used in wide-area network (WAN) environments. Topics summarized here include point-to-point
More informationWAN Technology & Design. Dr. Nawaporn Wisitpongphan
WAN Technology & Design Dr. Nawaporn Wisitpongphan 1 WAN Connection Modules 2 WAN Comparison 3 Integrated Services Digital Network (ISDN) All-digital phone line connection Technology since 1980s Allow
More informationChapter 4 NETWORK HARDWARE
Chapter 4 NETWORK HARDWARE 1 Network Devices As Organizations grow, so do their networks Growth in number of users Geographical Growth Network Devices : Are products used to expand or connect networks.
More informationIntroduction. Communication
Introduction These slides are created by Dr. Yih Huang of George Mason University. Students registered in Dr. Huang's courses at GMU can make a single machine-readable copy and print a single copy of each
More informationTELECOMMUNICATIONS NETWORKS. University Pierre and Marie Curie (Paris 6) Master Informatique Spécialité Réseaux
TELECOMMUNICATIONS NETWORKS University Pierre and Marie Curie (Paris 6) Master Informatique Spécialité Réseaux 1 2 Equipe pédagogique Guy Pujolle Thi-Mai-Trang Nguyen Stéfano Secci Anastasios Giovanidis
More information