Introduction to Networks and the Internet
|
|
- Jemima Gordon
- 6 years ago
- Views:
Transcription
1 Introduction to Networks and the Internet CMPE 80N Announcements First quiz on Friday, Covers material up to and including Closed books, notes, etc. Winter 2004 Lecture Data Transmission Modems Analog and digital transmission. Historically, communication infrastructure for analog transmission. Digital data needed to be converted: modems (modulator-demodulator). MODEM = Modulator/Demodulator Converts digital to analog before transmitting over analog channel (e.g., telephone networks). To transmit data: DAC (digital-to-analog converter) To receive data: ADC (analog-to-digital converter) 2-way communication: needs two modems. Each modem contains circuitry to encode outgoing data and decode incoming data. 3 4
2 Types of Communication Modems (cont d) Half-duplex communication: Modems contain complex circuitry to: Only one party can talk at a time. E.g., walkie-talkie. Full-duplex communication: Both parties can talk at the same time. E.g., telephone Modems use full-duplex communication. Modulate/demodulate the analog signal. Allows for the transmission of moderately high bit-rate over the telephone line. Compress the data. Reduces the amount of bits to be transmitted Detect bit errors due to transmission. Achievable bit rates. E.g., Kb/s 5 6 Input/Output Connections I/O Connections How to connect peripheral devices to a computer. Serial and parallel connections. Serial: bits are sent one at a time. Sequence of bits sent in parallel using parallel wires. 7 8
3 I/O Connections: Standards USB and FireWire Standard: defines the details of a particular technology. RS-232 is a standard for serial communication between digital devices. It s full duplex Kb/s. Can only connect one device at a time. So if you want to connect a PC to many devices, you need as many cables coming out of your PC. USB (Universal Serial Bus). Can connect many devices through a USB hub. Bitrates: 12 Mb/s (USB 1.1) to 480 Mb/s (USB 2.0). Provides power to small devices (e.g., mouse). Firewire (IEEE 1394). Can connect many devices through a FireWire hub. Bitrates: up to 400 Mb/s. Very popular for video cameras and storage systems, also to connect two devices (without a PC). Can provide power to small devices (e.g., video cameras) Some Considerations Solution: Broadband Coonections RS-232, USB, Firewire, all have constraints on the maximum length of the wire. We already know a solution: modem. Uses the telephone network. However, modems provide insufficient bitrate. Also, when using the modem, you cannot use the telephone for voice communication! 11 12
4 Broadband Connection Types Integrated Services Digital Network (ISDN). Asymmetric Digital Subscriber Line (ADSL). Cable Modem. Wireless. Satellite Links. ISDN ISDN provides for communication of digitized voice and data to subscribers over the conventional local loop (i.e., using the same wiring as for analog telephone). In the Basic Rate Interface (BRI), ISDN offers three separate digital channels (2B+D). All on the same wire! (Multiplexing) Primary Rate Interface (23B+D). Requires higher capacity lines than local loop! ISDN (cont d) ISDN (cont d) The two B channels are intended to carry digital voice, data, or digital streams To connect computer to ISDN, user needs a special network termination device (NT1). Bitrate of each B-channel: 64 kb/s (overall, 128 kb/s) The D channel is used as a control channel E.g., to request services which are then supplied over the B channels, to carry caller ID information, etc. Bitrate of D channel: 16 kb/s. NT1 device a.k.a. ISDN modem. A modem converts a digital signal to an analog signal; ISDN is inherently digital, so no such conversion is necessary. Need to dial a number to start a connection 15 16
5 ISDN (cont d) ADSL ISDN was initiated in 1984, and was available in the USA in the early 90s. It was an attempt to replace the analog phone system with a digital voice+data system. It never really succeeded Currently, ISDN is obsolete, because it offers limited bitrate at a fairly high price. Still a possibility for Internet connection where other forms of broadband are not available. ADSL allows transmission of high bit-rates over local loop. It does not require any changes in the wiring. In addition, it does not preempt the local loop. A user can use the telephone for analog voice communication and at the same time transmit data or stream video. It requires a splitter and a ADSL modem The splitter separates voice/fax signals from data stream. PC to ADSL modem: typically USB ADSL scheme ADSL (cont d) To achieve high bitrate transmission, ADSL must use sophisticated technology It is adaptive : ADSL modems at the two ends probe the line between them to find its characteristics, and then agree to communicate using techniques that are optimal for that line. Depending on the characteristics of the wiring, different bit-rates can be achieved If a house is too far form the End office (switching center), ADSL is not available
6 ADSL (cont d) ADSL is asymmetric: it provides a higher bitrate downstream than upstream. Downstream: 32 kb/s to 6.4 Mb/s (more typically, 1.5 Mb/s) Upstream: 32 to 640 kb/s (more typically, 256 kb/s) Asymmetry is OK when high bitrate data is transmitted to the user. E.g.: Video-On-Demand, Internet radio In some cases, symmetric communication is preferable. E.g.: Videoconferences Cable Modems CATV (Community Antenna TV, or cable TV) uses coax cable (less susceptible to interference) 1-Km coax cable can accommodate bitrates of 1-2 Gb/s! Only one cable is used for a neighborhood Different TV channels are multiplexed on it. Cable systems are designed to carry many more television signals than currently available. There is unused capacity that can be used for data communication! >80% of US homes are already reached by CATV Cable Modems (cont d) Cable Modems (cont d) User can connect using a cable modem A splitter separates the TV and the data signals. Problem: all users in the neighborhood share the same available capacity in the same cable! If all users in the neighborhood transmit data at the same time, the available bitrate is reduced. E.g., if there are 50 Mb/s available, and 100 users in the neighborhood use it simultaneously, each user has only 0.5 Mb/s Coax cables from several neighborhoods connect to a concentrator The concentrator uses high capacity fiber optics cables to connect to the head end, which is connected to the Internet. Communication is asymmetric Originally, CATV was designed only for downstream communication! Available bitrates: 23 Downstream: 1.5 to 2 Mb/s Upstream: 128 kb/s 24
7 Satellite Systems Satellite Systems (cont d) Digital communication satellites were deployed by telecommunication companies as an alternative to terrestrial lines. They can now be used as local loop technology (e.g., DirectPC). Advantages: Can reach arbitrary geographic locations. Does not require wiring. Has high bandwidth. Perfect for broadcasting (can reach many users at once). 25 Disadvantages: It s a shared medium (the bitrate depends on the number of simultaneous users). Delay (latency) can be relatively high (<1s) Not ideal for playing interactive app s (e.g., games). You have to put a dish on your roof! Initially, uplink was not provided. Needed to use a separate phone line to uplink information. Nowadays it is a two-way system. 26 Physical Layer: Summary Different types of signal: Analog and digital. Analog communication infrastructure: Need to convert digital to analog before transmitting: ADC. DAC before entering computer. Digitization: Sampling. Sampling period and frequency (samples/sec or Hertz). Sample representation (quantization). Bit rate. Physical Layer: Summary (Cont d) Modems. Input/output connections. RS 232. USB. Firewire. Broadband. ISDN. ADSL. Cable modem. Satellite
8 Other Wireless Networks Cellular Networks Cellular phones:voice. Cellular networks: shift from voice to data. New wireless devices: pagers, PDAs. New services: Web access, , instant messaging, etc Cellular Concept: Motivation Some Cellular Terminology Early mobile radio systems: Mobile. Large coverage with single, high-powered transmitter. But, no frequency re-use due to interference. Since finite spectrum allocation, need: high capacity (number of users) with limited spectrum and wide coverage. Base station. Mobile Switching Center (MSC). Handoff. Cell
9 Cellular Architecture Cellular Fundamentals mobile System-level idea, no major technological changes. Many low-power transmitters instead of single, high power on (large cell). Service area divided into small cells covered by each low power transmitter. Each transmitter (or base station) allocated a portion of the spectrum. Nearby BSs assigned different channel group to minimize interference. Scalability: as more users subscribe, more BSs can be added using lower transmission power) Frequency Reuse Handoff/Handover Mobile hosts can change cells while communicating. Hand-off occurs when a mobile host starts communicating via a new base station. Handoff decision made based on signal strength
10 Cellular Networks: Evolution Second Generation (2G) Evidence of the wireless success! Since 1996, number of new mobile phone subscribers exceeded number of new fixed phone subscribers! 1 st. Generation (1G): analog technology. FDMA. Analog FM. Most of today s cellular networks use 2G standards. Early 90s. Digital technology. Lighter, smaller devices with longer battery life. Better reception and channel utilization G Wireless Networks Multi-megabit Internet access, VoIP, ubiquitous always-on access. Wireless Local Area Networks Local area network connectivity using wireless communication. Single mobile device for everything (integrated service approach). New, world-wide standard. International Mobile Telephone 2000 (IMT 2000) IEEE WLAN standard. Example: WaveLan, Aironet Wireless LAN may be used for Last hop to a wireless host. Wireless connectivity between hosts on the LAN
11 Other WLAN Standards MANETs HomeRF Mobile, (wireless), multi-hop ad-hoc networks. Proponents of frequency hopingspread spectrum (FH-SS). HomeRF Mbps FH-SS. Formed by wireless hosts which may be mobile. Without (necessarily) using a pre-existing infrastructure. HIPERLAN Europe, mid 1990s. Similar capability to IEEE b. Routes between nodes may potentially contain multiple hops. Mobilitty cause routes to change Multi-hop Why MANETs? May need to traverse multiple hops to reach destination. Ease of deployment. Speed of deployment. Decreased dependence on infrastructure
12 Many Applications Personal area networking. Cell phone, laptop, ear phone, wrist watch. Military environments. Soldiers, tanks, planes. Civilian environments. Smart environments. Emergency operations Search-and-rescue Policing and fire fighting Monitoring and surveillance. 45
Data Communication. Introduction of Communication. Data Communication. Elements of Data Communication (Communication Model)
Data Communication Introduction of Communication The need to communicate is part of man s inherent being. Since the beginning of time the human race has communicated using different techniques and methods.
More informationPart I. Wireless Communication
1 Part I. Wireless Communication 1.5 Topologies of cellular and ad-hoc networks 2 Introduction Cellular telephony has forever changed the way people communicate with one another. Cellular networks enable
More informationChapter 1: introduction
Chapter 1: introduction our goal: v get feel and terminology v more depth, detail later in course v approach: use Internet as example overview: v what s the Internet? v what s a protocol? v edge; hosts,
More informationChapter 5. Voice Network Concepts. Voice Network Concepts. Voice Communication Concepts and Technology
Chapter 5 Voice Communication Concepts and Technology Voice Network Concepts Telephone switchboard - Circa 1898 Voice Network Concepts Telephone calls are connected from source via circuit switching. Circuit
More informationComputer Networking Introduction
Computer Networking Introduction Halgurd S. Maghdid Software Engineering Department Koya University-Koya, Kurdistan-Iraq Lecture No.1 Chapter 1 Introduction Text Book for this course Computer Networking:
More informationTwelfth Edition. Chapter 8: Wired and Wireless Communication. Copyright 2012 Pearson Education, Inc. Publishing as Prentice Hall 1
Computers Are Your Future Twelfth Edition Chapter 8: Wired and Wireless Communication Copyright 2012 Pearson Education, Inc. Publishing as Prentice Hall 1 Wired and Wireless Communication Copyright 2012
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 informationend systems, access networks, links circuit switching, packet switching, network structure
Introduction 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
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 informationA+ Guide to Hardware: Managing, Maintaining, and Troubleshooting, 5e. Chapter 10 Networking Essentials
A+ Guide to Hardware: Managing, Maintaining, and Troubleshooting, 5e Chapter 10 Networking Essentials Objectives Learn about hardware devices used for networking Learn about the different types of networks
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 informationIntegrated t Services Digital it Network (ISDN) Digital Subscriber Line (DSL) Cable modems Hybrid Fiber Coax (HFC)
Digital Local Loop Technologies Integrated t Services Digital it Network (ISDN) Handles voice and data Relatively l high h cost for low bandwidth (Skip) Digital Subscriber Line (DSL) Cable modems Hybrid
More informationLecture 8 Winter 2006 Enterprise and Personal Communications Networks
Information Technology Lecture 8 Winter 2006 Enterprise and Personal Communications Networks 1 Objectives Identify the reasons that multiuser systems are used in business. Describe eight network service
More informationMobile and Sensor Systems
Mobile and Sensor Systems Lecture 2: Mobile Medium Access Control Protocols and Wireless Systems Dr Cecilia Mascolo In this lecture We will describe medium access control protocols and wireless systems
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 informationEKT 450 Mobile Communication System
EKT 450 Mobile Communication System Chapter 1: Introduction to Mobile Communication System Prof Dr. Sabira Khatun, Dr. Muzammil Jusoh, Dr. Norsuhaida Ahmad School of Computer and Communication Engineering
More informationComputers Are Your Future Tenth Edition
Computers Are Your Future Tenth Edition Chapter 3: Wired & Wireless Communication Copyright 2009 Pearson Education, Inc. Publishing as Prentice Hall 1 All rights reserved. No part of this publication may
More informationModule 1 Communication Networks. Version 1 ECE, IIT Kharagpur
Module 1 Communication Networks Lesson 1 Communication Networks An Introduction and Overview INSTRUCTIONAL OBJECTIVES General This lesson is designed to give the reader the concept and definition of a
More information(Refer Slide Time: 00:31)
Information Security 3 Sri M J Shankar Raman, Consultant Department of Computer Science and Engineering, Indian Institute of Technology Madras Module 48 Network access & physical media In this module we
More informationIt is the process of sharing data, programs, and information between two or more computers.
1 Communications It is the process of sharing data, programs, and information between two or more computers. Numerous applications depend on communication systems: E-mail Instant messaging (IM) Internet
More informationChapter 9 Introduction to Networks
Chapter 9 Introduction to Networks 9.1 Uses of a network Networks are used in many situations. We can see networks in places like offices, airports and factories. In fact we use networks in many situations
More informationChapter 3. Wired and Wireless Communication. What You Will Learn... Computers Are Your Future. What You Will Learn...
What You Will Learn... Computers Are Your Future Chapter 3 The definition of bandwidth The bandwidth needs of a typical user How modems change digital signals into analog Transmission media and methods
More informationA+ Guide to Hardware: Managing, Maintaining, and Troubleshooting, 5e. Chapter 10 Networking Essentials
A+ Guide to Hardware: Managing, Maintaining, and Troubleshooting, 5e Chapter 10 Networking Essentials Objectives Learn about hardware devices used for networking Learn about the different types of networks
More informationChapter 1 Introduction
Chapter 1 Introduction A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in PowerPoint form so you can add, modify, and delete
More information4G Mobile Communications
4G Mobile Communications Welcome to 4G The term 4G is used broadly to include several types of broadband wireless access communication systems, not only cellular telephone systems. One of the terms to
More informationCSIS Frequency Division Multiplexing. Basic Types of Multiplexing. Frequency Division Multiplexing. Frequency Division Multiplexing.
Multiplexing: combining information streams from multiple sources for transmission over a shared medium Demultiplexing: separating a combination back into individual information streams CSIS 4222 Ch 11:
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 informationThe Internet and the World Wide Web
Technology Briefing The Internet and the World Wide Web TB5-1 Learning Objectives TB5-2 Learning Objectives TB5-3 How Did the Internet Get Started? Internet derived from internetworking 1960s U.S. Defense
More informationBikash Sadhukhan. M.Tech(CSE) Lecturer. Dept of CSE/IT Techno India College of Technology
Bikash Sadhukhan. M.Tech(CSE) Lecturer. Dept of CSE/IT Techno India College of Technology Mobile Communication Entails transmission of data to and from handheld devices Two or more communicating devices
More informationAd Hoc Networks: Introduction
Ad Hoc Networks: Introduction Module A.int.1 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA 1 Ad Hoc networks: introduction A.int.1-2
More informationGLOSSARY OF CELLUAR TERMS
GLOSSARY OF CELLUAR TERMS Air Interface: It is the operating system of a wireless network.. Airtime: The amount of time a person spends talking on their cellular device. AMPS: Advanced mobile phone service
More informationWireless Security Background
Wireless Security Background Wireless Networks The need for mobile computing Laptops, PDAs, Bluetooth devices Smart phones Enabling technology Wireless communication Two important characteristics Wireless
More informationCellular Communication
Cellular Communication Cellular Communication Cellular communication is designed to provide communications between two moving units, or between one mobile unit and one stationary phone or land unit (PSTN).
More informationWhat s a protocol? What s a protocol? A closer look at network structure: What s the Internet? Hardware view: What s the Internet?
What s the Internet? Hardware view: What s the Internet? Hardware view: PC server wireless laptop cellular handheld access points wired s connected computing devices: hosts = end systems running apps communication
More informationWIMAX. WIMAX (Worldwide Interoperability for Microwave Access ): Field of application:
WIMAX WiMAX (Worldwide Interoperability for Microwave Access) is a technology that focuses on providing data over long distances in a wireless mode, very similar to the cellular mobile concept. WiMAX is
More informationCOMMUNICATIONS AND NETWORKS
COMMUNICATIONS AND NETWORKS Data Communications Data communications describes a process in which one computer transfers data, instructions, and information to another computer. The basic model for data
More informationHome Area Networks. Outline
Home Area Networks CS 687 University of Kentucky Fall 2015 Acknowledgment: Some slides are adapted from the slides distributed with the book Computer Networking: A Top Down Approach, 5th edition. Jim Kurose,
More informationMobile Ad Hoc Networks: Basic Concepts and Research Issues
Mobile Ad Hoc s: Basic Concepts and Research Issues Ing. Alessandro Leonardi aleonardi@dieei.unict.it Wireless s Generations (1/3) Generation 1G 2G 2.5G 3G 4/5G Time 1980s 1990s Late1990s 2000s (2010 full
More informationUnit 09 Computer Networks
Unit 09 Computer Networks Gain a knowledge about network devices. Discuss what network devices are required to create a basic network Draw a bespoke network drawing using Visio 2 In order to setup a network
More informationPengantar Teknologi Informasi dan Teknologi Hijau. Suryo Widiantoro, ST, MMSI, M.Com(IS)
Pengantar Teknologi Informasi dan Teknologi Hijau Suryo Widiantoro, ST, MMSI, M.Com(IS) 1 Topics covered 1. From analog to digital age 2. Networks 3. Wired-communication data 4. Wireless-communication
More informationIntroduction to Mobile Broadband (imb)
Introduction to Mobile Broadband (imb) Teaching By Asst.Prof.Dr. Suwat Pattaramalai suwat.pat@kmutt.ac.th Tel. 02-470-9079 Material: http://webstaff.kmutt.ac.th/~suwat.pat/ 3GPP WiMAX FORUM Introduction
More informationVISUAL SUMMARY COMMUNICATION CHANNELS COMMUNICATIONS. Communications and Networks
Rev.Confirming Pages VISUAL SUMMARY Communications and Networks COMMUNICATIONS COMMUNICATION CHANNELS Communications is the process of sharing data, programs, and information between two or more computers.
More informationChapter 9. Introduction. Communications
Chapter 9 Communications and Networks McGraw-Hill/Irwin Copyright 2008 by The McGraw-Hill Companies, Inc. All rights reserved. 1 Introduction Page 247 Cell phones and other wireless technologies are allowing
More informationObjectives Overview. Chapter 9 Networks and Communications. Discovering Computers Instructor: Imran Khalil MSc-IT 1 st semester Fall 2016
Chapter 9 Networks and Communications Instructor: Imran Khalil MSc-IT 1 st semester Fall 2016 Discovering Computers 2012 Your Interactive Guide to the Digital World Objectives Overview Discuss the purpose
More informationDiscovering Computers Chapter 9 Communications and Networks
Discovering Computers 2009 Chapter 9 Communications and Networks Chapter 9 Objectives Discuss the components required for successful communications Identify various sending and receiving devices Describe
More informationLIGHTS! Broadband Basics
LIGHTS! Broadband Basics Presented by: Tom Robinson, President 73 Chestnut Rd, Suite 301 Paoli, PA 19301 Phone (610) 889-7470 robinson@cbgcommunications.com NATOA ANNUAL CONFERENCE SEPTEMBER 17, 2013 2013
More informationMultiplexing (Recap)
Multiplexing (Recap) Multiplexing How to transfer data between two sites once there is a digital link between them? Analog to Digital (A2D) conversion Human voice is a continuous signal in the range 0-4
More informationCommunications and Networks
Information Technology Skills (DUT 122) CHAPTER 6: Communications and Networks Miss Wan Nor Ashiqin Wan Ali School of Human Development and Technocommunication Objectives Overview Discuss the purpose of
More informationPhysical Layer Part 3
Physical Layer Part 3 Transmission Media Networks: Transmission Media 1 Transmission Media Transmission medium:: the physical path between transmitter and receiver. Repeaters or amplifiers may be used
More informationObjectives. Learn how computers are connected. Become familiar with different types of transmission media
Objectives Learn how computers are connected Become familiar with different types of transmission media Learn the differences between guided and unguided media Learn how protocols enable networking 2 Objectives
More informationOverview of Networks
CMPT765/408 08-1 Overview of Networks Qianping Gu 1 Overview of Networks This note is mainly based on Chapters 1-2 of High Performance of Communication Networks by J. Walrand and P. Pravin, 2nd ed, and
More informationThe data transmission mode describes the direction of data flow. It is either simplex, half duplex or full duplex.
Data transmission Data transmission on a network involves serial transmission. It transfers data by sending one bit at a time through a single line. All data on a network is transferred using a data transmission
More informationNetwork+ Guide to Networks 6 th Edition. Chapter 8 Wireless Networking
Network+ Guide to Networks 6 th Edition Chapter 8 Wireless Networking Objectives Explain how nodes exchange wireless signals Identify potential obstacles to successful wireless transmission and their repercussions,
More informationWhite Paper Broadband Multimedia Servers for IPTV Design options with ATCA
Internet channels provide individual audiovisual content on demand. Such applications are frequently summarized as IPTV. Applications include the traditional programmed Video on Demand from a library of
More informationThe HighPoint Broadband Delivery System. Ermanno Pietrosemoli School on Radio Use for digital and Multimedia Communications ICTP, February 2002
The Broadband Delivery System Ermanno Pietrosemoli School on Radio Use for digital and Multimedia Communications ICTP, February 2002 economy conomy Driving Forces Computing, storage, transmission costs...go
More informationNetworking. Prof. Abdul Hameed
Networking Prof. Abdul Hameed http://informationtechnology.pk http://informationtechnology.pk 0 Chapter Topics Networking Fundamentals Network Architectures and Components Connecting to the Internet Installing
More informationAn Overview. 12/22/2011 Hardev Singh Manager (BB-NOC) MTNL Delhi
Broadband Technology An Overview 12/22/2011 Hardev Singh Manager (BB-NOC) MTNL Delhi 1 1 2 3 4 5 6 7 8 9 * 8 # 1 2 3 4 5 6 7 8 9 * 8 # Typical Narrowband (voice) setup Local Exchange PSTNSwitch telephone
More informationResidential Broadband (RBB)
Residential Broadband (RBB) Professor of Computer and Information Science Columbus, OH 43210 Jain@CIS.Ohio-State.Edu http://www.cis.ohio-state.edu/~jain/ 1 Service Aspects and Applications (SAA) Voice
More informationA+ Guide to Managing & Maintaining Your PC, 8th Edition. Chapter 16 Networking Types, Devices, and Cabling
A+ Guide to Managing & Maintaining Your PC, Chapter 16 Networking Types, Devices, and Cabling Objectives Learn about network types and topologies Learn about the hardware used to build local networks Learn
More informationProf. Shervin Shirmohammadi SITE, University of Ottawa. Design Technologies. Lecture 17: Prof. Shervin Shirmohammadi CEG
Lecture 17: Design Technologies Prof. Shervin Shirmohammadi SITE, University of Ottawa Prof. Shervin Shirmohammadi CEG 4185 17-1 Design Goals From the architecture and its components and simulation, we
More informationWZRDnet. A Low-Power Wireless Ad-Hoc Mesh Network for Austere Tactical Environments. February 14, 2018
White Paper TELEGRID Technologies, Inc. WZRDnet A Low-Power Wireless Ad-Hoc Mesh Network for Austere Tactical Environments February 14, 2018 23 Vreeland Road Suite 290 Florham Park, NJ 07932 www.telegrid.com
More informationITP 140 Mobile Applications Technologies. Networks
ITP 140 Mobile Applications Technologies Networks A First Look Under the Hood 2 3 Communication Channels Mediums for transporting data from one system to another Physical Twisted Pair (CAT-3, CAT-5/6)
More informationData Communication & Networks G Session 5 - Main Theme Wireless Networks. Dr. Jean-Claude Franchitti
Data Communication & Networks G22.2262-001 Session 5 - Main Theme Wireless Networks Dr. Jean-Claude Franchitti New York University Computer Science Department Courant Institute of Mathematical Sciences
More informationTELECOMMUNICATION SYSTEMS
TELECOMMUNICATION SYSTEMS By Syed Bakhtawar Shah Abid Lecturer in Computer Science 1 INTEGRATED SERVICES DIGITAL NETWORKS (ISDN) The original concept of ISDN dates back to the early 1970s. Its design,
More informationHome-Mobile. The Cast Devices. The Cast Network Related (2) The Cast Network Related. Voice over IP (VoIP) Dr. Hayden Kwok-Hay So
The Cast Devices Home-Mobile Desktop Computer Mostly data Wired network Standard Telephone Mostly voice Wired phone line CCST9015 6th Oct, 2010 Dr. Hayden Kwok-Hay So Notebook Computer Mostly data Wireless
More informationINTRODUCTION DATA COMMUNICATION TELECOMMUNICATIONS SYSTEM COMPONENTS 1/28/2015. Satish Chandra satish0402.weebly.com
INTRODUCTION DATA COMMUNICATION Satish Chandra satish0402.weebly.com The term telecommunication means communication at a distance. The word data refers to information presented in whatever form is agreed
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 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 informationWireless Network Introduction
Wireless Network Introduction Module W.bas.1 Dr.M.Y.Wu@CSE Shanghai Jiaotong University Shanghai, China Dr.W.Shu@ECE University of New Mexico Albuquerque, NM, USA 1 Wireless network introduction W.bas.1-2
More informationCHAPTER -1. Introduction to Computer Networks
CHAPTER -1 Introduction to Computer Networks PRELIMINARY DEFINITIONS computer network :: [Tanenbaum] a collection of autonomous computers interconnected by a single technology. communications network ::a
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 informationThis paper discusses home networks that can deliver video as well as data and their growing sophistication and capacity.
Hybrid Coax/PLC Video Distribution Home Networks This paper discusses home networks that can deliver video as well as data and their growing sophistication and capacity. Hybrid networks are based on existing
More informationProgram Title: Telecommunication Engineering Technology Postsecondary Number: (AS) (AAS
July 2006 Florida Department of Education Program Title: Telecommunication Engineering Technology CIP Number 1615030302 (AS) 0615030302 (AAS) Length AS/AAS Degree 64 Credits After successfully completing
More informationCEN 538 Wireless LAN & MAN Networks
King Saud University College of Computer and Information Sciences Department of Computer Engineering CEN 538 Wireless LAN & MAN Networks Dr. Ridha OUNI rouni@ksu.edu.sa LMS web site References Text book
More informationInternet Access Technologies
Lecture 4: Local Loop Technologies, Internet Access and Leased Lines Dr. Mohammed Hawa Electrical Engineering Department University of Jordan EE426: Communication Networks Internet Access Technologies
More informationTelephone. Basic Telephone. A telephone is an electronic device used for two- way talking with other people. EE1D01 Electrical Science for Everyone
Telephone A telephone is an electronic device used for two- way talking with other people. 1 Basic Telephone Telephone Subscriber Line CO (Local Exchange) T dial switch cradle switch tip (+) ear R mouth
More informationComputer Networks. Wireless and Mobile Networks. László Böszörményi Computer Networks Mobile - 1
Computer Networks Wireless and Mobile Networks László Böszörményi Computer Networks Mobile - 1 Background Number of wireless (mobile) phone subscribers now exceeds number of wired phone subscribers! Computer
More informationDriving Broadband beyond 1 Million. Steve Hornung and Neil Jefferies
Driving Broadband beyond 1 Million Steve Hornung and Neil Jefferies British Telecommunications plc, 2003 2 Driving Broadband beyond 1 million Current Broadband Platform Status Technology to Extend the
More informationPhysical Layer: Multiplexing, Spectrum Spreading and Switching. Covers Chapters# 06 & 08 from Text Book
Physical Layer: Multiplexing, Spectrum Spreading and Switching Covers Chapters# 06 & 08 from Text Book 2 Multiplexing From Chapter#06 3 Multiplexing If bandwidth of a medium linking two devices is greater
More informationLecture #6 Multiplexing and Switching
SPRING 2015 Integrated Technical Education Cluster At AlAmeeria E-626-A Data Communication and Industrial Networks (DC-IN) Lecture #6 Multiplexing and Switching Instructor: Dr. Ahmad El-Banna 1 Agenda
More informationComputer Networks and Internet
Computer Networks and Internet Objectives Computer Networks Internet 2 Computer Networks Introducing Computer Networks A computer network consists of two or more computers linked together to exchange data
More informationIntroduction to Networks and the Internet
Introduction to Networks and the Internet HTML tutorial today. Announcements CMPE 80N Spring 2003 Week 5 1 2 MAC Protocols MAC Protocols Round-robin. Scheduled-access. Contention-based. Contention-based
More informationIntroduction to Networking Devices
Introduction to Networking Devices Objectives Explain the uses, advantages, and disadvantages of repeaters, hubs, wireless access points, bridges, switches, and routers Define the standards associated
More informationFew Multiplexing Applications
Few Multiplexing Applications by Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in Web: http://home.iitj.ac.in/~manaskhatua http://manaskhatua.github.io/ The
More informationWireless and WiFi. Daniel Zappala. CS 460 Computer Networking Brigham Young University
Wireless and WiFi Daniel Zappala CS 460 Computer Networking Brigham Young University Wireless Networks 2/28 mobile phone subscribers now outnumber wired phone subscribers similar trend likely with Internet
More informationFew Multiplexing Applications
Few Multiplexing Applications by Dr. Manas Khatua Assistant Professor Dept. of CSE IIT Jodhpur E-mail: manaskhatua@iitj.ac.in Web: http://home.iitj.ac.in/~manaskhatua http://manaskhatua.github.io/ The
More informationDECT Congress 2003 Erich Kamperschroer Chairman DECT Forum
Congress 2003 Erich Kamperschroer Chairman Forum Worldwide Deployment applications and feature FP PPtPP RLL FP Residential Cordless Operator Services PP WRS The World of PP PP FP Cordless SoHo and SME
More informationMedium Access Control
Medium Access Control All material copyright 1996-2009 J.F Kurose and K.W. Ross, All Rights Reserved 5: DataLink Layer 5-1 Link Layer Introduction and services Multiple access protocols Ethernet Wireless
More informationA Study on Systems Beyond IMT-2000 in Korea
A Study on Systems Beyond IMT-2000 in Korea May 28, 2002 Vice President Ki-Chul Han, Ph.D (kchan kchan@etri.re. @etri.re.kr kr) Mobile Telecommunication Research Laboratory Electronics and Telecommunciations
More informationWireless# Guide to Wireless Communications. Objectives
Wireless# Guide to Wireless Communications Chapter 10 Wireless Wide Area Networks Objectives Describe wireless wide area networks (WWANs) and how they are used Describe the applications that can be used
More informationCOPYRIGHTED MATERIAL. Introduction. Harri Holma and Antti Toskala. 1.1 WCDMA technology and deployment status
1 Introduction Harri Holma and Antti Toskala 1.1 WCDMA technology and deployment status The first Third Generation Partnership Project (3GPP) Wideband Code Division Multiple Access (WCDMA) networks were
More informationCS 471G Friday, 11 January Introduction 2-1
CS 471G Friday, 11 January 2013 Introduction 2-1 Chapter 1 Introduction A note on the use of these ppt slides: We re making these slides freely available to all (faculty, students, readers). They re in
More informationA Whirlwind Introduction to the Internet. A Whirlwind Introduction to the Internet Overview
CPSC 852 Intering A Whirlwind Introduction to the Internet Michele Weigle Department of Computer Science Clemson University mweigle@cs.clemson.edu http://www.cs.clemson.edu/~mweigle/courses/cpsc852 1 A
More informationBasic Video Troubleshooting 101
Basic Video Troubleshooting 101 Check Power On Self-Test (POST) beeps. Re-seat video card. Check any configuration switch settings. Swap video card, monitor, video cable. 80 Basic Video Troubleshooting
More informationDOCSIS FOR LTE SMALL CELL BACKHAUL ADDRESSING PERFORMANCE AND THROUGHPUT REQUIREMENTS FOR MOBILE BACKHAUL
DOCSIS FOR LTE SMALL CELL BACKHAUL ADDRESSING PERFORMANCE AND THROUGHPUT REQUIREMENTS FOR MOBILE BACKHAUL WHITE PAPER Small cells can be used to increase wireless network capacity, provide coverage in
More informationCSC 4900 Computer Networks: Wireless Networks
CSC 4900 Computer Networks: Wireless Networks Professor Henry Carter Fall 2017 Last Time Mobile applications are taking off! What about current platforms is fueling this? How are an application s permission
More informationAdvanced Computer Networks Exercise Session 4. Qin Yin Spring Semester 2013
Advanced Computer Networks 263-3501-00 Exercise Session 4 Qin Yin Spring Semester 2013 1 Administration If you haven't received any email about your submission We got your solutions for A1 & A2 About solutions
More informationSwitching, Mobile Phones, Cable, Beginning Data Link Layer. CS158a Chris Pollett Feb 21, 2007.
Switching, Mobile Phones, Cable, Beginning Data Link Layer CS158a Chris Pollett Feb 21, 2007. Outline Switching Mobile Phones Cable Start of Data Link Layer Switching We will now examine how the switching
More informationHybrid Coax-Wireless Multimedia Home Networks Using Technology. Noam Geri, Strategic Marketing Manager
White Paper Hybrid Coax-Wireless Multimedia Home Networks Noam Geri, Strategic Marketing Manager Cable Broadband Communications Group, Texas Instruments Introduction Wireless home networking has emerged
More information