A typical WAN structure includes the following components.
|
|
- Marvin Matthews
- 5 years ago
- Views:
Transcription
1 CBCN4103
2 WAN is a computer network that spans a relatively large geographical area. Typically, a WAN consists of two or more LANs. A WAN is a network usually provided by a specialised company called a network provider. Computers connected to a wide-area network are often connected through public networks, such as the telephone system. They can also be connected through leased lines or satellites. The largest WAN in existence is the Internet. WAN technologies are classified into two i.e. packet switching or circuit switching.
3
4 A typical WAN structure includes the following components.
5 Packet Switching refers to technologies in which messages are divided into packets before they are sent. Each packet is then transmitted individually and can even follow different routes to its destination. Once all the packets forming a message arrive at the destination, they are recompiled into their original form. Breaking communication down into packets allows the same data path to be shared among many users in the network. This type of communication between sender and receiver is known as connectionless. Most traffic over the Internet uses packet switching and the Internet is basically a connectionless network.
6 Most modern Wide Area Network (WAN) protocols, including TCP/IP, X.25, and Frame Relay, are based on packet-switching technologies. In contrast, circuit switching is the way the PSTN works in which the same path cannot be shared among users. A dedicated line is allocated for transmission between two parties. Circuit-switching is ideal when data must be transmitted quickly and must arrive in the same order in which it is sent. This is the case with most real-time and time-sensitive data, such as live audio and video. Packet switching is more efficient and robust for data that can withstand some delays in transmission, such as messages and Web pages.
7 TCP/IP stands for Transmission Control Protocol/Internet Protocol, the suite of communications protocols used to connect hosts on the Internet. TCP/IP uses several protocols, the two main ones being TCP and IP. TCP/IP is built into most network operating systems nowadays and is used by the Internet, making it the de facto standard for transmitting data over networks. Even network operating systems that have their own IP protocol known as IPX, developed by Novell Netware, also support TCP/IP.
8 X.25 is an open standard WAN technology for packetswitching networks. It is one of the earliest International standards d for packet switching. The X.25 standard was approved by the CCITT (now the ITU) in It defines layers 1, 2, and 3 in the OSI Reference Model. X.25 allow remote devices to communicate with each other over public network without the expense of individual leased lines. An X.25 network consists of a network of interconnected nodes (or packet switching exchanges) to which user equipment can connect. The end user of the network is known as data terminal equipment (DTE) and the carrier's equipment is Data Circuit-terminating equipment (DCE). X.25 routes packets across the network from DTE to DCE.
9 Data terminal equipment devices are end systems that communicate across the X.25 network. They are usually terminals, personal computers, or network hosts, and are located on the premises of individual subscribers. DCE devices are communications devices, such as modems and packet switches, that provide the interface between DTE devices and a PSE (Packet Switching Exchange), and are generally located in the carrier's (or network provider s) facilities. PSEs are switches that compose the bulk of the carrier's network. They transfer data from one DTE device to another through the X.25 Packet Switch Network.
10 X.25 Logical connection
11 Frame Relay is a packet-switching protocol for connecting devices on a WAN. It operates at level two (the Data Link layer) in the OSI seven layer model. It is used in applications such as LAN interconnection. The biggest difference between Frame Relay and X.25 is that X.25 guarantees data integrity and network managed flow control at the expense of some network delays. Frame Relay switches packets end to end much faster, but there e is no guarantee a of data integrity. ty Unlike X.25, Frame Relay does not provide error checking on data at a time when transmission media is very reliable (fibre optics media era).
12 Frame-relay networks: Provide error detection but not error recovery. It is up to end devices to request a retransmission of lost packets. Can provide data transfer up to 1.54 Mbps. Have a variable packet size (called a frame). Supports data transfer rates at T-1 (1.544 Mbps) and T-3 (45 Mbps) speeds. Frame relay can be implemented over a variety of connection lines (56K, T1, T3) Operate at the Physical and Data Link layers of the OSI model.
13 User data is sent in a frame through the network
14 Circuit-switched is a type of network in which a physical path is obtained for and dedicated di d to a single connection between two endpoints in the network for the duration of the connection. Ordinary voice phone service is circuit- switched. The telephone company reserves a specific physical path to the number you are calling for the duration of your call. During that time, no one else can use the physical lines involved.
15 Leased line is a permanent telephone connection between two points set up by a telecommunications common carrier or service/network provider. Typically, leased lines are used by businesses to connect geographically g distant offices. Unlike normal dial-up connections, a leased line is always on(or active).
16 ISDN, which stands for Integrated Services Digital Network, is a system of digital phone connections which has been available for over a decade. This system allows voice and data to be transmitted simultaneously across the world using end-to-end digital connectivity. ISDN, voice and data are carried by bearer channels (B channels) occupying a bandwidth of 64 kbps (kilo bits per second). A data channel (D channel) handles signaling at 16 kbps or 64 kbps, depending on the service type. This separation of data and signalling channels, known as out of band enables setting up and termination of circuits done very quickly.
17 The physical cable of an ISDN connection is divided into logical channels. Channels are classified as one of two types: B channels are used to carry data. D channels are used to carry control and signaling information. There are two basic types of ISDN service: Basic Rate ISDN (BRI) 1. B Channel: Two 64Kbps 2. D Channel: One 16Kbps Primary Rate ISDN (PRI) 1. B Channel: Twenty-three 64 Kbps 2. D Channel: One 64 Kbps
18 The total bandwidth of an ISDN BRI line is 144 Kbps (two B channels and one D channel). The total data transfer rate is 128 Kbps (data is sent only on the two B channels). ISDN BRI is a relatively low-cost WAN service that is ideal for the following situations: Home office or telecommuters who need a relatively fast connection Businesses that need to periodically send data between sites (bursty traffic patterns)
19 ISDN BRI offers the following benefits over dial-up modems and other WAN connection options: Faster data transfer rates (128 Kbps) than dial-up modems (56 Kbps maximum) Faster call establishment (dial-up) than modems Lower cost than other WAN solutions (users pay a monthly fee plus connection charges)
20 ADSL is an acronym for Asymmetric Digital Subscriber Line, a technology that allows more data to be sent over existing copper telephone lines (PSTN). ADSL is asymmetrical, which means it provides higher bit rates in the downstream direction (from Telco Local Exchange to the subscriber s site) than the upstream direction (from the subscriber site to the Local Exchange). Asymmetric means not symmetrical. ADSL supports data rates of from 1.5 to 9 Mbps when receiving data (known as the downstream rate) and from 16 to 640 Kbps when sending data (known as the upstream rate).
21 Another technology, ATM, attempts to combine the best of both worlds the guaranteed delivery of circuit-switched networks and the robustness and efficiency of packet-switching networks. Asynchronous Transfer Mode (ATM), designed by the ATM Forum and adopted by ITU-T, is a newer technology than X.25 and Frame Relay.
22
23 ATM is a network technology based on transferring data in cells (packets of a fixed size) unlike X.25 and Frame Relay which use variable length packets. The small, constant cell size allows ATM equipment to transmit video, audio, and computer data over the same network, and assure that no single type of data hogs the line. ATM cells are a fixed length of 53 octets. Since ATM switches utilise very short, fixed-length cells, they can process and switch information much faster than frame relay switches.
24 ATM creates a fixed channel, or route, between two points whenever data transfer begins. This differs from TCP/IP, in which messages are divided into packets and each packet can take a different route from source to destination. This difference makes it easier to track and bill data usage across an ATM network, but it makes it less adaptable to sudden surges in network traffic.
25 ATM creates a fixed channel, or route, between two points whenever data transfer begins. This differs from TCP/IP, in which messages are divided into packets and each packet can take a different route from source to destination. This difference makes it easier to track and bill data usage across an ATM network, but it makes it less adaptable to sudden surges in network traffic.
WAN Technologies CCNA 4
WAN Technologies CCNA 4 Overview Note: Most of this will be described in more detail in later chapters. Differentiate between a LAN and WAN Identify the devices used in a WAN List WAN standards Describe
More informationLecture 1 Overview - Data Communications, Data Networks, and the Internet
DATA AND COMPUTER COMMUNICATIONS Lecture 1 Overview - Data Communications, Data Networks, and the Internet Mei Yang Based on Lecture slides by William Stallings 1 OUTLINE Data Communications and Networking
More informationWAN technology which are to be discussed:
WAN Technology Operates at 3 layer OSI model as below: 1. PHY 2. Data Link 3. Network Most of WAN technology are packetswitched network categorized as Switched Virtual circuit Network ( 3-phase, connection
More informationModule 3. Wide Area Networking (WAN)
Module 3 Wide Area Networking (WAN) When many nodes or LAN s are connected together in a large scale, we have a WAN. This may be world wide. Because of the separation of the nodes, the Public Data Network
More informationCh. 5 - ISDN - Integrated Services Digital Network
Ch. 5 - ISDN - Integrated Services Digital Network 1 Overview 2 Basic elements in ISDN 3 ISDN - access 4 ISDN - the bus 5 ISDN - examples 6 ISDN - between LAN s 7 ISDN - access to Internet 8 ISDN - small
More informationNetwork Devices,Frame Relay and X.25
Network Devices,Frame Relay and X.25 Hardware/Networking Devices: Networking hardware may also be known as network equipment computer networking devices. Network Interface Card (NIC): NIC provides a physical
More informationCh. 4 - WAN, Wide Area Networks
1 X.25 - access 2 X.25 - connection 3 X.25 - packet format 4 X.25 - pros and cons 5 Frame Relay 6 Frame Relay - access 7 Frame Relay - frame format 8 Frame Relay - addressing 9 Frame Relay - access rate
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 informationCOMPUTER NETWORK Model Test Paper
Model Test Paper Question no. 1 is compulsory. Attempt all parts. Q1. Each question carries equal marks. (5*5 marks) A) Difference between Transmission Control Protocol (TCP) and User Datagram Protocol.
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 informationVoIP Dictionary, Glossary and Terminology
VoIP Dictionary, Glossary and Terminology The following provides a glossary of terms and definitions that are commonly used in VoIP Solutions. We hope this will provide a good reference for you during
More informationComputer Networks. Introduction to Network. Dr. Adel Gaafar Abd Elrahim
Computer Networks Introduction to Network Dr. Adel Gaafar Abd Elrahim A Communications Model Source generates data to be transmitted Transmitter Converts data into transmittable signals Transmission System
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 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 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 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 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 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 informationCommunication Networks
Communication Networks Chapter 3 Multiplexing Frequency Division Multiplexing (FDM) Useful bandwidth of medium exceeds required bandwidth of channel Each signal is modulated to a different carrier frequency
More informationSample. Overview of WAN Connections. Objectives. Module 1
Module 1 Objectives This module introduces the basic elements of WAN connections and describes the role each element plays in creating that connection. After completing this module, you should be able
More informationIntroduction to Information Technology Turban, Rainer and Potter John Wiley & Sons, Inc. Copyright 2005
Introduction to Information Technology Turban, Rainer and Potter John Wiley & Sons, Inc. Copyright 2005 Network and Telecommunications Basics Chapter Outline The telecommunications system Network services
More informationWilliam Stallings Data and Computer Communications 7 th Edition. Chapter 10 Circuit Switching and Packet Switching
William Stallings Data and Computer Communications 7 th Edition Chapter 10 Circuit Switching and Packet Switching Switching Networks Long distance transmission is typically done over a network of switched
More informationNetwork basics. Unit objectives Describe the basic components of a network Identify characteristics of network technologies Analyze the OSI model
Network basics Unit objectives Describe the basic components of a network Identify characteristics of network technologies Analyze the OSI model Topic A Topic A: Network concepts Topic B: Network architectures
More informationWireless Networks. Communication Networks
Wireless Networks Communication Networks Types of Communication Networks Traditional Traditional local area network (LAN) Traditional wide area network (WAN) Higher-speed High-speed local area network
More informationConcept Questions Demonstrate your knowledge of these concepts by answering the following questions in the space provided.
123 Chapter 10 WANs and Routers One major characteristic of a wide-area network (WAN) is that the network operates beyond the local LAN's geographic scope. It uses the services of carriers, such as regional
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 informationLecture 22 Overview. Last Lecture. This Lecture. Next Lecture. Internet Applications. ADSL, ATM Source: chapter 14
Last Lecture Lecture 22 Overview Internet Applications This Lecture ADSL, ATM Source: chapter 14 Next Lecture Wireless Networking Source: chapter 15 COSC244 & TELE202 Lecture 22 - ADSL, ATM 1 Modem Enable
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 informationGeneral comments on candidates' performance
BCS THE CHARTERED INSTITUTE FOR IT BCS Higher Education Qualifications BCS Level 5 Diploma in IT April 2018 Sitting EXAMINERS' REPORT Computer Networks General comments on candidates' performance For the
More informationWhat is the fundamental purpose of a communication system? Discuss the communication model s elements.
What is the fundamental purpose of a communication system? The fundamental purpose of a communication system is the exchange of data between two parties. Discuss the communication model s elements. The
More informationInternet Architecture and Protocol
Internet Architecture and Protocol Set# 04 Wide Area Networks Delivered By: Engr Tahir Niazi Wide Area Network Basics Cover large geographical area Network of Networks WANs used to be characterized with
More informationThere are two ways to establish VCs:
Virtual Circuits 1 Virtual Circuits The connection through a Frame Relay network between two DTEs is called a virtual circuit (VC). The circuits are virtual because there is no direct electrical connection
More informationSRT Communications, Inc. Broadband Access Services Wholesale Rate Plan Effective January 1, 2010
Effective January 1, 2010 Table of Contents GENERAL TERMS AND CONDITIONS Asymmetric Broadband Service (ADSL) Section 1 Symmetric Broadband Service (SDSL).... Section 2 Term Plan Options... Section 3 Volume
More informationIntranets and Virtual Private Networks (VPNs)
Intranets and Virtual Private Networks (VPNs) Definition Private networking involves securely transmitting corporate data across multiple sites throughout an entire enterprise. Creating a truly private
More informationIntroduction to Computer
PDHonline Course E175 (8 PDH) Introduction to Computer Instructor: Dale W. Callahan, Ph.D., P.E. and Lea B. Callahan, P.E. 2012 PDH Online PDH Center 5272 Meadow Estates Drive Fairfax, VA 22030-6658 Phone
More informationNetworks 15.2 Multiplexing Technologies Access Networks 15.5 Common Peripheral Interfaces
Chapter 15 Computer and Multimedia Networks 15.11 Basics of Computer and Multimedia Networks 15.2 Multiplexing Technologies 15.3 LAN and WAN 15.4 Access Networks 15.5 Common Peripheral Interfaces 15.6
More informationChapter 11: Wide-Area Networks and the Internet
Chapter 11: Wide-Area Networks and the Internet MULTIPLE CHOICE 1. MAN stands for: a. Manchester Access Network c. Metropolitan-Area Network b. Multiple-Area Network d. Multiple Access Network 2. Packet
More informationAccessing the WAN Chapter 1 Modified by Tony Chen 07/20/2008
Introduction to WANs Accessing the WAN Chapter 1 Modified by Tony Chen 07/20/2008 ITE I Chapter 6 2006 Cisco Systems, Inc. All rights reserved. Cisco Public 1 Notes: If you see any mistake on my PowerPoint
More information6.1. WAN Type. WAN types include the following:
6.1. WAN Type WAN types include the following: Method Point to Point Circuit Switching Packet Switching Description A point to point connection is a single, pre established path from the customer's network
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 informationInternet Telephony. Definition. Overview. Topics. 1. Introduction
Internet Telephony Definition Internet telephony refers to communications services voice, facsimile, and/or voice-messaging applications that are transported via the Internet, rather than the public switched
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 informationCCNA 4 - Final Exam (A)
CCNA 4 - Final Exam (A) 1. A network administrator is asked to design a system to allow simultaneous access to the Internet for 250 users. The ISP for this network can only supply five public IPs. What
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 informationCh.16 - Wireless WAN System Architectures
Ch.16 - Wireless WAN System Architectures 1 Wireless WAN 2 GSM via PSTN 3 GSM via ISDN 4 GPRS 5 Mobitex 6 CDPD 7 PPDC 8 UMTS 9 Future Systems 10 Systems Summary 1 11 Systems Summary 2 1 This section will
More informationCircuit Switching and Packet Switching
Chapter 10: Circuit Switching and Packet Switching CS420/520 Axel Krings Page 1 Switching Networks Long distance transmission is typically done over a network of switched nodes Nodes not concerned with
More informationUnderstanding TeleCom Networks Today II The World of Data
Understanding The World of Data Course Description Explore the world of data 2.5/3G, Optical, Frame Relay, ATM Networks, Wireless and more... Networks are converging. No more discrete data and voice networks
More informationWide Area Networking Technologies
Wide Area Networking Technologies TABLE OF CONTENTS INTRODUCTION... 1 TASK 1... 1 1.1Critically evaluate different WAN technologies... 1 1.2 WAN traffic intensive services... 4 TASK 2... 5 1.3 and 1.4
More informationSwitched Multimegabit Data Service
CHAPTER 14 Chapter Goals Tell how SMDS works, and describe its components. Describe the operational elements of the SMDS environment, and outline its underlying protocol. Discuss related technologies.
More informationFrame Relay. Frame Relay Information 1 of 18
Frame Relay Information 1 of 18 This document was retrieved from the Web and has been been edited by Thomas Jerry Scott for use in his TCP/IP network classes. Chapter Goals Describe the history of Frame
More informationA LAN is a high-speed data network that covers a relatively small geographic area. It typically connects workstations, personal computers, printers,
CBCN4103 A LAN is a high-speed data network that covers a relatively small geographic area. It typically connects workstations, personal computers, printers, servers, and other devices. LANs offer computer
More informationTutorials and Practicals 31W6 ADMINISTRIVIA. A Communications Model. Communications and Networks. Simplified Communications
31W6 ADMINISTRIVIA Lectures Weeks 1-9: Mon 1100 B4 Tue 1400 B4 Fri 1000 A1 Weeks 10-12 Mon 1400 A3 Wed Fri 1200 V1 1100 A3 Tutorials and Practicals Tutorials Wed 0900 3B146 *** Wed 1000 3B146 Thur 1000
More informationOperating Systems CS 571
Computer Networks: Overview Operating Systems CS 571 Network types Range Bandwidth (Mbps) Latency (ms) LAN 1-2 kms 10-1000 1-10 WAN worldwide 0.010-600 100-500 MAN 2-50 kms 1-150 10 Wireless LAN 0.15-1.5
More informationConcept Questions Demonstrate your knowledge of these concepts by answering the following questions in the space that is provided.
223 Chapter 19 Inter mediate TCP The Transmission Control Protocol/Internet Protocol (TCP/IP) suite of protocols was developed as part of the research that the Defense Advanced Research Projects Agency
More informationWide Area Networks (WANs) Slide Set 6
Wide Area Networks (WANs) Slide Set 6 Wide Area Networks (WANs) WAN Purposes Link sites (usually) within the same corporation Remote access for individuals who are off-site Internet access for individuals
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 informationIntroduction to Network Technologies & Layered Architecture BUPT/QMUL
Introduction to Network Technologies & Layered Architecture BUPT/QMUL 2015-3-5 Review What is the Internet? How does it work? When & how did it come about? Who controls it? Where is it going? 2 Agenda
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 informationLecture (05) Network interface Layer media & switching II
Lecture (05) Network interface Layer media & switching II By: ElShafee ١ Agenda Circuit switching technology (cont,..) Packet switching technique Telephone network ٢ Circuit switching technology (cont,..)
More informationCommunications and Networking 1
Communications and Networking 1 ET4254 CS4225 CS5222 Lecturer: Dr. Kevin Murphy kevin.murphy@ul.ie Electronic & Computer Engineering Department, University of Limerick, Limerick 1 ET4254 - Communications
More informationELC 537 Communication Networks
Modern Academy for Engineering and Technology Electronics Engineering and Communication Technology Dpt. ELC 537 Communication Networks Prepared by: Dr. Nelly Muhammad Hussein Sections & Objectives Principles
More informationCisco Cisco Certified Network Associate (CCNA)
Cisco 200-125 Cisco Certified Network Associate (CCNA) http://killexams.com/pass4sure/exam-detail/200-125 Question: 769 Refer to exhibit: Which destination addresses will be used by Host A to send data
More informationReview of Network Technologies
Indian Institute of Technology Kharagpur Review of Network Technologies Prof. Indranil Sen Gupta Dept. of Computer Science & Engg. I.I.T. Kharagpur, INDIA Lecture 2: Review of network technologies On completion,
More informationUnit-3 Wireless Data Services
Unit-3 Wireless Data Services CPDP(Cellular Digital Packet Data) CPDP technology is used by telecommunication carriers to transfer data to users via unused analog cellular networks. It uses the entire
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 informationprovides for a single domain name. Additional domain names are available upon request in accordance with the rates, terms and conditions below.
TELUS Communications Company 4th Revised Page 226-1 Cancels 3rd Revised Page 226-1 226 Wholesale Internet ADSL Service 226.1 Service Description Wholesale Internet ADSL Service is a broadband access service
More informationNetwork management and QoS provisioning - revise. When someone have to share the same resources is possible to consider two particular problems:
Revise notes Multiplexing & Multiple Access When someone have to share the same resources is possible to consider two particular problems:. multiplexing;. multiple access. The first one is a centralized
More informationIntegrated Services Digital Network
CHAPTER 12 Chapter Goals Explain what ISDN is. Describe ISDN devices and how they operate. Describe the specifications for ISDN data transmittal for the three layers at which ISDN transmits. Introduction
More informationSwitched Multimegabit Data Service (SMDS)
CHAPTER 14 Switched Multimegabit Data Service (SMDS) Background Switched Multimegabit Data Service (SMDS) is a high-speed, packet-switched, datagram-based WAN networking technology used for communication
More informationAccess to the Web. Coverage. Basic Communication Technology. CMPT 165: Review
Access to the Web CMPT 165: Review Tamara Smyth, tamaras@cs.sfu.ca School of Computing Science, Simon Fraser University December 5, 2011 Access to the Web requires: a computer (of some kind) a connection
More informationM242 COMPUTER NETWORS AND SECURITY
M242 COMPUTER NETWORS AND SECURITY 2.1. Network Models: UNIT - II OSI MODEL AND LAN PROTOCOLS 1. Explain Network model A network is a combination of hardware and software that sends data from one location
More informationIntroducing ISDN ISDN (Integrated Services Digital Network) User-Network Interface (UNI),
ISDN and DDR CCNA 4 Note to instructors If you have downloaded this presentation from the Cisco Networking Academy Community FTP Center, this may not be my latest version of this PowerPoint. For the latest
More informationNetworks 15.2 Multiplexing Technologies Access Networks 15.5 Common Peripheral Interfaces
Chapter 15 Computer and Multimedia Networks 15.11 Basics of Computer and Multimedia Networks 15.2 Multiplexing Technologies 15.3 LAN and WAN 15.4 Access Networks 15.5 Common Peripheral Interfaces 15.6
More informationLecture (08) Fundamentals of WANs (II)
Agenda Lecture (08) Fundamentals of WANs (II) OSI Layer 2 of WANs ATM & SONET WAN Dr. Ahmed M. ElShafee ١ ٢ OSI Layer 2 of WANs OSI Layer 2 of WANs (2) WAN protocols used on point to point serial links
More informationMultimedia Communications
Multimedia Communications Directions and Innovations Introduction István Beszteri istvan.beszteri@hut.fi Multimedia Communications: Source Representations, Networks and Applications! Introduction! Networks
More informationLAN, MAN and WAN. Basics and Comparison. University of Damascus. Computer Engineering Dept. Digital Communications. By Abdulrahman Idlbi
In the name of Allah, the Most Gracious, the Most Merciful University of Damascus Computer Engineering Dept. Digital Communications LAN, MAN and WAN Basics and Comparison By Abdulrahman Idlbi Introduction
More informationChapter 6. The Protocol TCP/IP. Introduction to Protocols
Chapter 6 The Protocol TCP/IP 1 Introduction to Protocols A protocol is a set of rules that governs the communications between computers on a network. These rules include guidelines that regulate the following
More informationCOPYRIGHTED MATERIAL INTRODUCTION AND OVERVIEW
1 INTRODUCTION AND OVERVIEW The past few decades have seen the merging of computer and communication technologies Wide-area and local-area computer networks have been deployed to interconnect computers
More informationLocal area network (LAN) Wide area networks (WANs) Circuit. Circuit switching. Packets. Based on Chapter 2 of Gary Schneider.
Local area network (LAN) Network of computers located close together Wide area networks (WANs) Networks of computers connected over greater distances Based on Chapter 2 of Gary Schneider. (2009). E-Business.
More informationSignaling System 7 (SS7) By : Ali Mustafa
Signaling System 7 (SS7) By : Ali Mustafa Contents Types of Signaling SS7 Signaling SS7 Protocol Architecture SS7 Network Architecture Basic Call Setup SS7 Applications SS7/IP Inter-working VoIP Network
More informationCS610- Computer Network Solved Subjective From Midterm Papers
Solved Subjective From Midterm Papers May 08,2012 MC100401285 Moaaz.pk@gmail.com Mc100401285@gmail.com PSMD01 CS610- Computer Network Midterm Examination - Fall 2011 1. Where are destination and source
More informationAntelope Consulting FINAL, JULY Appendix K: Glossary
Antelope Consulting FINAL, JULY 2001 DFID Internet Costs Study Appendix K: Glossary TESSA N GROVES, 16 SEPTEMBER 2001 Admin Lease rate APEC APEC TEL Call Detail Record Circuit-switched, Circuit switching
More informationSAE6A/SAZ6B DATA COMMUNICATION AND NETWORKING UNIT : I To V
SAE6A/SAZ6B DATA COMMUNICATION AND NETWORKING UNIT : I To V 1 UNIT 1:Syllabus Introduction to Data Communication Network Protocols & standards standards organizations Line Configuration Topology Transmission
More informationLecture (07) Fundamentals of WANs (I)
Lecture (07) Fundamentals of WANs (I) Dr. Ahmed M. ElShafee ١ Agenda What is WAN? What is MAN? OSI layer1 of WANs Circuit switching services Packet Switching Services ٢ What is WAN? LAN standards and protocols
More informationComputer Networks Question Bank
Computer Networks Question Bank 1. Describe in detail OSI Model ANS: OSI (Open Systems Interconnection) is reference model for how applications can communicate over a network. A reference model is a conceptual
More informationBLM6196 COMPUTER NETWORKS AND COMMUNICATION PROTOCOLS
BLM6196 COMPUTER NETWORKS AND COMMUNICATION PROTOCOLS Prof. Dr. Hasan Hüseyin BALIK (1 st Week) Outline Course Information and Policies Course Syllabus 1. Data Communications, Data Networks, and the Internet
More informationIntegrated Service Digital Network (ISDN) Circuit-Switched and Packet-Switched Data Bearer Services Performance Specifications TR ISSUE B
ISSUE B December 1996 Integrated Service Digital Network (ISDN) Circuit-Switched and Packet-Switched Data Bearer Services Performance Specifications Technical Reference NOTICE TR 73586 This Technical Reference
More informationIT114 NETWORK+ Learning Unit 1 Objectives: 1, 2 Time In-Class Time Out-Of-Class Hours 2-3. Lectures: Course Introduction and Overview
IT114 NETWORK+ Course Objectives Upon successful completion of this course, the student will be able to: 1. Identify the devices and elements of computer networks; 2. Diagram network models using the appropriate
More informationBroadband Definition DSL Agenda Definition Types Components of DSL Service Accounting for DSL Operations Regulated ILEC Non-Regulated Subsidiary - Reg
NTCA s 19 th Annual FINANCE & ACCOUNTING CONFERENCE Presented by: Kathy Jackson, CPA Curtis Blakely & Co., P.C. P. O. Box 5486 Longview, TX 75608 903.758.0734 September 10, 2009 kjackson@cbandco.com www.cbandco.com
More informationCompetitive Public Switched Telephone Network (PSTN) Wide- Area Network (WAN) Access Using Signaling System 7 (SS7)
Competitive Public Switched Telephone Network (PSTN) Wide- Area Network (WAN) Access Using Signaling System 7 (SS7) Definition Using conventional Internet access equipment, service providers may access
More informationEliminating the Last Mile Bottleneck
Eliminating the Last Mile Bottleneck P. Michael Henderson michael.henderson@cox.net 1 Agenda Technology and Market Drivers Performance Requirements VoDSL System Architecture Closed Form Analysis Non-Closed
More informationnetworks List various types of networks and their
Chapter 15 Networks Chapter Goals Describe the core issues related to computer networks List various types of networks and their characteristics Explain various topologies of local-area networks Explain
More information(Refer Slide Time: 2:20)
Data Communications Prof. A. Pal Department of Computer Science & Engineering Indian Institute of Technology, Kharagpur Lecture -23 X.25 and Frame Relay Hello and welcome to today s lecture on X.25 and
More informationLecture (06) Network Access layer LAN, & WAN. Agenda. By: Dr. Ahmed ElShafee. Ethernet Framing (2) Ethernet Framing What is MAN?
Lecture (06) Network Access layer fundamentals III LAN, & WAN Agenda Ethernet Framing What is WAN? What is MAN? By: Dr. Ahmed ElShafee ١ Dr. Ahmed ElShafee, ACU : Fall 2015, Networks II ٢ Dr. Ahmed ElShafee,
More informationThe Broadband Revolution
The Broadband Revolution Broadband is a culture that has changed how we work, shop, play and communicate. Key to any culture is learning from others and adopting beneficial practices. Broadband technologies
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 informationSRM ARTS AND SCIENCE COLLEGE SRM NAGAR, KATTANKULATHUR
SRM ARTS AND SCIENCE COLLEGE SRM NAGAR, KATTANKULATHUR 603203 DEPARTMENT OF COMPUTER SCIENCE & APPLICATIONS QUESTION BANK (2017-2018) Course / Branch : BCA Semester /Year : EVEN / III Subject Name : Data
More informationData and Computer Communications
Data and Computer Communications CHAPTER 1 Tenth Edition by William Stallings Data Communications, Data Networks, and the Internet Data and Computer Communications, Tenth Edition by William Stallings,
More informationNarrowband ISDN. (ISDN = Integrated Services Digital Network)
Narrowband ISDN (ISDN = Integrated Services Digital Network) critically: Invention Subscribers Don t Need (technology push instead of demand pull) is that really so? N-ISDN vs. B-ISDN (based on ATM) How
More informationExample Networks and the Physical Layer. CS158a Chris Pollett Feb 5, 2007.
Example Networks and the Physical Layer CS158a Chris Pollett Feb 5, 2007. Outline Example Networks The Physical Layer Architecture of the Internet Last day, we looked at two network which led up to the
More information