Computer Networks (Introduction to TCP/IP Protocols)
|
|
- Ethelbert Burke
- 5 years ago
- Views:
Transcription
1 Network Security(CP33925) Computer Networks (Introduction to TCP/IP Protocols) 부산대학교공과대학정보컴퓨터공학부
2 Network Type Elements of Protocol OSI Reference Model OSI Layers What we ll learn today 2
3 Definition of Network Network Type For the purpose of efficient use of computers by allowing computers to be interconnected by communication networks to share software or databases, or to use large computers remotely Client/Server Network Communication Methods Data Transmission Method Topology Peer to Peer Circuit Switching Network Packet Switching Network Cell Switching Network Bus Star Size LAN MAN WAN Mesh Ring 3
4 Communication Methods Client/Server Peer to Peer BROADCAST Communication method that sends data to all systems on LAN 1 : All Destination : FF:FF:FF:FF:FF:FF UNICAST Communication method for transferring data to a specific destination on LAN 1 : 1 MULTICAST Communication method for transmitting data to a specific large number on the LAN 1 : Group 4
5 Data Transmission Methods (1/3) Circuit Switched Network Operation A method of exclusively using a connection until the communication is completed by setting a dedicated communication line as a physical connection before communication Characteristic It requires a relatively long time to connect, there is no transmission delay because there is no need to consider other communication attempts 5
6 Data Transmission Methods (2/3) Packet Switched Network Operation The information to be transmitted is divided into small units called packets When a packet is sent to the packet-switching network by putting the address of the source and the destination for each packet, the packet-switching center looks at the address and delivers it to the final destination Characteristic Communication path is not established in communication like circuit-switched network Each packet can be transmitted over multiple paths depending on the network conditions. 6
7 Data Transmission Methods (3/3) Cell Switched Network Operation In the network, the protocol is simplified, and the data is transmitted in units of packets called cells Flow control and error control are processed between terminals to realize highspeed properties such as circuit switching. Characteristic ATM (Asynchronous Transfer Mode) is a typical type of cell switching network It transmits cells consisting of 5 bytes of header and 48 bytes of data, 7
8 Topology (1/2) Bus Topology All hosts on the network are connected to a single cable One communication line shared by all systems When a message transmitted from one system is transmitted to all the systems (broadcasting) Poor speed due to collisions when there are many systems configured in the network Bus Topology 8
9 Topology (2/2) Star Topology Central control system manages all control of communication Data Between Systems Is Not Delivered to Another System The central system determines the performance of the network. If the central system is inoperable, the entire network can not communicate Star Topology Ring Topology Start and end points do not exist Closed circulation type Token network If a system fails, communication is not possible. Delay in data transmission Ring Topology 9
10 LAN (Local Area Network) Size (1/2) A communication network constituted by connecting a communicationrelated device, etc. in the same building or company (factory) by a highspeed dedicated line Characteristics Network of the same institution Limited area within a few Km range Communication speed faster than WAN Metropolitan Area Network (MAN) New network between LAN and WAN Characteristics Transfer rate: 45Mbps or more Transmission medium: coaxial cable, optical cable The IEEE access method uses a standardized medium access control (MAC) protocol 10
11 Wide Area Network (WAN) Size (2/2) A network in which interconnected LANs are interconnected is called a WAN The main factors affecting design and performance are transmission media Characteristics Transmission speed: 56Mbps or less Higher line error rate than LAN Transmission delay is high Has a more complex network structure than LAN The routing algorithm that connects the two destinations to the shortest path is important. Consider transmission efficiency and characteristics in WAN design Eliminates flow control and excessive delay under limited traffic conditions 11
12 Elements of Protocol (1/3) A protocol is synonymous with rule. A protocol consists of a set of rules that govern data communications. A protocol determines what is communicated, how it is communicated and when it is communicated. 12
13 Elements of Protocol (2/3) The key elements of a protocol are syntax, semantics and timing Syntax Structure or format of the data Indicates how to read the bits - field delineation Semantics Interprets the meaning of the bits Knows which fields define what action Timing When data should be sent and what Speed at which data should be sent or speed at which it is being received. 13
14 Elements of Protocol (3/3) Functions Addressing Addressing for each transport layer Sequencing Specifying the order in which protocol data units are sent when they are sent Fragmentation & Reassembling When transferring large data, it is divided into small units with high transmission efficiency and recombination Data Flow Control Adjust the amount or speed of data coming from the sending entity Connection Control In connection-oriented data transfer, connection establishment, data transfer, disconnection Encapsulation Add data control information Error Control Technique to detect when SDU or PCI is wrong in data exchange Synchronization Two entities simultaneously share well-defined argument values Multiplexing Techniques for multiple systems to communicate on a single communication line Transmission Service Prioritization, Control of Service Classes and Security Requirements 14
15 OSI Reference Model Open Systems Interconnection (OSI) Reference model provides a general framework for standardization defines a set of layers and services provided by each layer one or more protocols can be developed for each layer Developed by the International Organization for Standardization (ISO) also published by ITU-T (International Telecommunications Union) 15
16 Consists of 7 Layers OSI - The Layer Model Each layer performs a subset of the required communication functions Each layer relies on the next lower layer to perform more primitive functions Each layer provides services to the next higher layer Changes in one layer should not require changes in other layers 16
17 OSI as Framework for Standardization Layer functionalities are described by ISO Different standards can be developed based on these functionalities 17
18 Protocol specification Elements of Standardization Operates between the same layer on two systems May involve different platforms Protocol specification must be precise Format of data units Semantics of all fields Service definition Functional description of what is provided to the next upper layer Addressing Referenced by SAPs 18
19 The OSI Environment (1/2) User support layer Transmission layer Network layer Application Presentatio n Session Transport Network Data Link Physical OSI 7 Layer Provide user interface Data presentation, encryption/decryption Session formation, communication synchronization, data exchange, etc. Retransmission Provide a logical address to use for route determination Accessing media using MAC address Responsible for bit shift between devices 19
20 The OSI Environment (2/2) 20
21 OSI Layers (1/8) Physical Physical interface between devices Characteristics Mechanical - interface specs Electrical - voltage levels for bits, transmission rate, coding, etc. Data Link Basic services error detection and control, flow control at the link level (point to point) Higher layers may assume error free transmission Later a sublayer is added to Data Link Layer MAC (Medium Access Control) sublayer to deal with broadcast networks 21
22 OSI Layers (2/8) Network Transfer of information through communication network network related issues Network nodes (relays/routers) should perform switching and routing functions QoS (Quality of Service) and congestion control are also addressed in this layer Several other internetworking issues e.g. differences in addressing, max. data length, etc. Higher layers do not need to know about underlying networking technology Not needed on direct links 22
23 Example of Network Layer Operation 23
24 IP (Internet Protocol) OSI Layers (3/8) The core of the TCP/IP protocol suite Two versions co-exist v4 the widely used IP protocol v6 has been standardized in 1996, but still not widely deployed IP (v4) header minimum 20 octets (160 bits) IPv4 Header 24
25 IP (Internet Protocol) Example of IP Packet Total Length Fragmention Frag/Offset Header Checksum Version/Header Length Differentiated Services Flag Identifier Time To Live Protocol Source IP Dest. IP 25
26 OSI Layers (4/8) IP (Internet Protocol) Addressing
27 Use of a Relay/Router 27
28 OSI Layers (5/8) Transport End to end exchange of data In sequence, no losses, no duplicates If needed, upper layer data are split into smaller units Reliable connection = provides flow and error control In TCP terms, a connection is a temporary association between enti ties in different systems TCP PDU Called TCP segment Includes source and destination port Identify respective users (applications) TCP Header pair of ports (together with the IP addresses) uniquely identify a connection; such an ide ntification is necessary in order TCP to track segments between entities. 28
29 OSI Layers (6/8) TCP PDU Src Port Dest Port Sequence Number Ack Number TCP Flags Window TCP Checksum Urgent Pointer TCP Offset TCP option Type Length MSS 29
30 Example of TCP Connection Establishment TCP PDU Three-way Handshake Client Server 1 Closed Listen 2 SYN_Send Client_My_Seq Listen Server_Client_Seq 3 SYN_Send Client_Server_Seq SYN_Received Server_My_Seq Server_Client_Seq +1 4 Established Established Session 30
31 TCP PDU Example of TCP Connection Close Four-way Handshake Client Server 31
32 OSI Layers (7/8) UDP User Datagram Protocol Alternative to TCP end-to-end protocol Not guaranteed delivery UDP Header No preservation of sequence No protection against duplication Minimum overhead Source Port Destination Port Length UDP Checksum 32
33 OSI Layers (8/8) Session Control of dialogues whose turn to talk? Dialogue discipline (full-duplex, half-duplex) Checkpointing and recovery Presentation Data formats Data compression Encryption Application Support for various applications e.g. HTTP, SMTP, telnet 33
34 Operation of TCP and IP 34
35 Some Protocols in TCP/IP Suite (1/3) 35
36 Some Protocols in TCP/IP Suite (2/3) ICMP A protocol that diagnoses the status of the sender and the status of the destination node A representative tool that uses ICMP is ping It operates on the IP layer but is separate from the transport layer protocol of TCP and UDP Error diagnosis message and diagnostic query message 36
37 Some Protocols in TCP/IP Suite (3/3) ARP (Address Resolution Protocol) A protocol that broadcasts an IP address and takes over its MAC address B s IP Addr. Request A B A Reply B s MAC Addr. B 37
38 Interconnected set of networks May be seemed as a large network Internetworking Each constituent network is a subnetwork Entire configuration referred to as an internet not the Internet conceptually the same, but by internet we do not mean a specific network the Internet is the most important example of an internet 38
39 Internetworking Devices Each subnetwork supports communication among the devices attached to that subnetwork End systems (ESs) Subnetworks connected by intermediate systems (ISs) In practice, ISs are routers that are used to relay and route packets between different subnetworks. If subnetworks use different Network Access Protocols, router should support all of the protocols. In OSI terminology, a router works at layer 3 (network layer). 39
40 Routers Interconnect dissimilar subnetworks without any modifications on architecture of subnetworks. Must accommodate differences among networks, such as Addressing schemes network addresses may need to be translated Maximum packet sizes if two subnetworks have different limits for max. packet sizes, then router may need fragment/reassemble the packets We have seen that subnetworks may have different network access and physical layers, but they have to speak the same (inter)network protocol implemented in all end systems and routers. The most important internetwork protocol is the IP protocol. 40
41 Configuration for TCP/IP Example 41
42 Action of Sender 42
43 Action of Router 43
44 Action of Receiver 44
45 General Network Attack Steps Footprinting Collect basic information about Victim Scanning Check whether the server that provides the service operates and the service it provides Step1. Information Collection Listing List information from footprinting and scanning Network Vulnerability Based on the collected information, we exploits Victim's vulnerability to attack Step2. Vul. Attack MITM DDoS SideJacking SSL Strip Wireless 45
46 46
Computer Networks with Internet Technology William Stallings. Chapter 2 Protocols and the TCP/IP Protocol Suite
Computer Networks with Internet Technology William Stallings Chapter 2 Protocols and the TCP/IP Protocol Suite Need For Protocol Architecture E.g. File transfer Source must activate comms. Path or inform
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 informationChapter 2 - Part 1. The TCP/IP Protocol: The Language of the Internet
Chapter 2 - Part 1 The TCP/IP Protocol: The Language of the Internet Protocols A protocol is a language or set of rules that two or more computers use to communicate 2 Protocol Analogy: Phone Call Parties
More informationReview of Important Networking Concepts
Review of Important Networking Concepts Review: ed communication architecture The TCP/IP protocol suite 1 Networking Concepts Protocol Architecture Protocol s Encapsulation Network Abstractions 2 1 Sending
More informationThe OSI Model. Open Systems Interconnection (OSI). Developed by the International Organization for Standardization (ISO).
Network Models The OSI Model Open Systems Interconnection (OSI). Developed by the International Organization for Standardization (ISO). Model for understanding and developing computer-to-computer communication
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 informationCS-461 Internetworking. Dr. Mohamed Aboutabl
CS-461 Internetworking Dr. Mohamed Aboutabl http://www.cs.jmu.edu/users/aboutams The McGraw-Hill Companies, Inc., 2000 1 Chapter 1 Introduction The McGraw-Hill Companies, Inc., 2000 2 Internet today Network
More informationChapter 3 Protocols and the TCP/IP Suite
Chapter 3 Protocols and the TCP/IP Suite 3.1 The Need for a Protocol Architecture need for a standard communication tasks by layers architecture peer protocol: a set of rules or conventions to exchange
More informationData Communication and Network. Introducing Networks
Data Communication and Network Introducing Networks Introduction to Networking Computer network, or simply network Refers to the connection of two or more computers by some type of medium You can connect
More informationData and Computer Communications. Protocols and Architecture
Data and Computer Communications Protocols and Architecture Characteristics Direct or indirect Monolithic or structured Symmetric or asymmetric Standard or nonstandard Means of Communication Direct or
More informationIntroduction to Open System Interconnection Reference Model
Chapter 5 Introduction to OSI Reference Model 1 Chapter 5 Introduction to Open System Interconnection Reference Model Introduction The Open Systems Interconnection (OSI) model is a reference tool for understanding
More informationDefining Networks with the OSI Model. Module 2
Defining Networks with the OSI Model Module 2 Objectives Skills Concepts Objective Domain Description Objective Domain Number Understanding OSI Basics Defining the Communications Subnetwork Defining the
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 informationNetwork.... communication system for connecting end- systems. End-systems a.k.a. hosts PCs, workstations dedicated computers network components
Networking 1 Network... communication system for connecting end- systems End-systems a.k.a. hosts PCs, workstations dedicated computers network components 2 Multiaccess vs.. Point-to-point Multiaccess
More informationITEC 3800 Data Communication and Network. Introducing Networks
ITEC 3800 Data Communication and Network Introducing Networks Introduction to Networking Computer network, or simply network Refers to the connection of two or more computers by some type of medium You
More informationGoals and topics. Verkkomedian perusteet Fundamentals of Network Media T Circuit switching networks. Topics. Packet-switching networks
Verkkomedian perusteet Fundamentals of Media T-110.250 19.2.2002 Antti Ylä-Jääski 19.2.2002 / AYJ lide 1 Goals and topics protocols Discuss how packet-switching networks differ from circuit switching networks.
More informationChapter 16 Networking
Chapter 16 Networking Outline 16.1 Introduction 16.2 Network Topology 16.3 Network Types 16.4 TCP/IP Protocol Stack 16.5 Application Layer 16.5.1 Hypertext Transfer Protocol (HTTP) 16.5.2 File Transfer
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 informationTCP/IP THE TCP/IP ARCHITECTURE
TCP/IP-1 The Internet Protocol (IP) enables communications across a vast and heterogeneous collection of networks that are based on different technologies. Any host computer that is connected to the Internet
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 information1: Review Of Semester Provide an overview of encapsulation.
1: Review Of Semester 1 1.1.1.1. Provide an overview of encapsulation. Networking evolves to support current and future applications. By dividing and organizing the networking tasks into separate layers/functions,
More informationBLM6196 COMPUTER NETWORKS AND COMMUNICATION PROTOCOLS
BLM6196 COMPUTER NETWORKS AND COMMUNICATION PROTOCOLS Prof. Dr. Hasan Hüseyin BALIK (2 nd Week) 2. Protocol Architecture, TCP/IP, and Internet-Based Applications 2.Outline The Need for a Protocol Architecture
More informationET4254 Communications and Networking 1
Topic 9 Internet Protocols Aims:- basic protocol functions internetworking principles connectionless internetworking IP IPv6 IPSec 1 Protocol Functions have a small set of functions that form basis of
More informationChapter 09 Network Protocols
Chapter 09 Network Protocols Copyright 2011, Dr. Dharma P. Agrawal and Dr. Qing-An Zeng. All rights reserved. 1 Outline Protocol: Set of defined rules to allow communication between entities Open Systems
More informationNetwork Models. Behrouz A. Forouzan Data communication and Networking Fourth edition
Chapter 2 Network Models Behrouz A. Forouzan Data communication and Networking Fourth edition 1 Layered Tasks We use the concept of layers in our daily life. As an example, let us consider two friends
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 informationChapter 2 Network Models 2.1
Chapter 2 Network Models 2.1 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Network Models n Network Architecture: n A) Hardware: at the core of any network;
More informationNetworking Applications
Networking Dr. Ayman A. Abdel-Hamid College of Computing and Information Technology Arab Academy for Science & Technology and Maritime Transport 1 Outline Internet Layers Internet Data Packet transmission
More informationOrganizations have developed standard sets of protocols
Network Models Organizations have developed standard sets of protocols Some of these organizations are: The International Standards Organization (ISO) The Institute of Electrical and Electronic Engineers
More informationES623 Networked Embedded Systems
ES623 Networked Embedded Systems Introduction to Network models & Data Communication 16 th April 2013 OSI Models An ISO standard that covers all aspects of network communication is the Open Systems Interconnection
More informationPart VI. Appendixes. Appendix A OSI Model and Internet Protocols Appendix B About the CD
Part VI Appendixes Appendix A OSI Model and Internet Protocols Appendix B About the CD OSI Model and Internet Protocols APPENDIX A In this appendix, you will Learn about the OSI model Review the network
More informationArchitectures of Communication Subsystems
Architectures of Communication Subsystems Open System Interconnection Reference Model Computer Networks Lecture 2 http://goo.gl/pze5o8 Connection-Oriented versus Connectionless Communication 2 Connection-Oriented
More informationCommunicating over the Network
Communicating over the Network Network Fundamentals Chapter 2 Version 4.0 1 Network Structure The elements of communication 3 common elements of communication Message source people/electronic devices need
More informationL6: OSI Reference Model
EECS 3213 Fall 2014 L6: OSI Reference Model Sebastian Magierowski York University 1 Outline The OSI Reference Model An organized way of thinking about network design (from low-level to high-level considerations)
More informationComputer Network : Lecture Notes Nepal Engineering College Compiled by: Junior Professor: Daya Ram Budhathoki Nepal Engineering college, Changunarayan
Computer Network : Lecture Notes Nepal Engineering College Compiled by: Junior Professor: Daya Ram Budhathoki Nepal Engineering college, Changunarayan Chapter3: OSI Reference Model: Network Software: Network
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 information8. Networks. Why networked embedded systems General network architecture. Networks. Internet-enabled embedded systems Sensor networks
8. Networks Why networked embedded systems General network architecture ISO seven network layers Networks I 2 C, CAN, Ethernet Internet-enabled embedded systems Sensor networks Computers as Components
More informationThe Client Server Model and Software Design
The Client Server Model and Software Design Prof. Chuan-Ming Liu Computer Science and Information Engineering National Taipei University of Technology Taipei, TAIWAN MCSE Lab, NTUT, TAIWAN 1 Introduction
More informationOSI Layer OSI Name Units Implementation Description 7 Application Data PCs Network services such as file, print,
ANNEX B - Communications Protocol Overheads The OSI Model is a conceptual model that standardizes the functions of a telecommunication or computing system without regard of their underlying internal structure
More informationIntroduction to Protocols
Chapter 6 Introduction to Protocols 1 Chapter 6 Introduction to Protocols What is a Network Protocol? A protocol is a set of rules that governs the communications between computers on a network. These
More informationCommunication Networks
Session 2. Application and Layered Architectures Dongsoo S. Kim Electrical and Computer Engineering. Indiana U. Purdue U. Indianapolis Communication s Various services and flexibility architectures Grouping
More informationComputer Communication & Networks / Data Communication & Computer Networks Week # 03
Computer Communication & Networks / Data Communication & Computer Networks Week # 03 M.Nadeem Akhtar CS & IT Department The University of Lahore Email: nadeem.akhtar@cs.uol.edu.pk URL-https://sites.google.com/site/nadeemuolcsccn/home
More informationChapter 12 Network Protocols
Chapter 12 Network Protocols 1 Outline Protocol: Set of defined rules to allow communication between entities Open Systems Interconnection (OSI) Transmission Control Protocol/Internetworking Protocol (TCP/IP)
More informationTSIN02 - Internetworking
TSIN02 - Internetworking Literature: Lecture 4: Transport Layer Forouzan: ch 11-12 Transport layer responsibilities UDP TCP 2004 Image Coding Group, Linköpings Universitet 2 Transport layer in OSI model
More informationNetwork Architecture Models
School of Business Eastern Illinois University Network Architecture Models (September 8, 2009) Abdou Illia, Fall 2009 Learning Objectives 2 Discuss the OSI reference Model Discuss the Internet Model Compare
More informationLecture Outline. Lecture 2. OSI model and networking. The OSI model and networking. The OSI model and networking. The OSI model and networking
Lecture 2 The OSI model Chapter 2, specifically pages 42-58 Dave Novak School of Business Administration, University of Vermont Sources: 1) Network+ Guide to Networks, Dean 2013 2) Comer, Computer Networks
More informationNetworks: Access Management
Networks: Access Management Class Notes # 3 Protocols and Layers (part 1) September 19, 2003 Functions A small set of functions form the basis of all protocols. Not all protocols have all functions; this
More informationLayer 4: UDP, TCP, and others. based on Chapter 9 of CompTIA Network+ Exam Guide, 4th ed., Mike Meyers
Layer 4: UDP, TCP, and others based on Chapter 9 of CompTIA Network+ Exam Guide, 4th ed., Mike Meyers Concepts application set transport set High-level, "Application Set" protocols deal only with how handled
More informationEITF25 Internet Techniques and Applications L7: Internet. Stefan Höst
EITF25 Internet Techniques and Applications L7: Internet Stefan Höst What is Internet? Internet consists of a number of networks that exchange data according to traffic agreements. All networks in Internet
More informationCCNA Exploration Network Fundamentals. Chapter 04 OSI Transport Layer
CCNA Exploration Network Fundamentals Chapter 04 OSI Transport Layer Updated: 05/05/2008 1 4.1 Roles of the Transport Layer 2 4.1 Roles of the Transport Layer The OSI Transport layer accept data from the
More information5105: BHARATHIDASAN ENGINEERING COLLEGE NATTARMPALLI UNIT I FUNDAMENTALS AND LINK LAYER PART A
5105: BHARATHIDASAN ENGINEERING COLLEGE NATTARMPALLI 635 854. NAME OF THE STAFF : R.ANBARASAN DESIGNATION & DEPARTMENT : AP/CSE SUBJECT CODE : CS 6551 SUBJECT NAME : COMPUTER NETWORKS UNIT I FUNDAMENTALS
More informationOSI Model. Teran Subasinghe MBCS, Bsc.(Hons) in Computer Science - University of Greenwich, UK
OSI Model Teran Subasinghe MBCS, Bsc.(Hons) in Computer Science - University of Greenwich, UK What is OSI Model? Open Systems Interconnection Reference Model Developed in 1984 by the International Standards
More informationTHE OSI MODEL. Application Presentation Session Transport Network Data-Link Physical. OSI Model. Chapter 1 Review.
THE OSI MODEL Application Presentation Session Transport Network Data-Link Physical OSI Model Chapter 1 Review By: Allan Johnson Table of Contents Go There! Go There! Go There! Go There! Go There! Go There!
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 informationComputer Networks รศ.ดร.อน นต ผลเพ ม. Assoc. Prof. Anan Phonphoem, Ph.D. Kasetsart University, Bangkok, Thailand
Jan May 2018 Computer Networks รศ.ดร.อน นต ผลเพ ม Assoc. Prof. Anan Phonphoem, Ph.D. anan.p@ku.ac.th http://www.cpe.ku.ac.th/~anan Computer Engineering Department Kasetsart University, Bangkok, Thailand
More informationNetworking for Data Acquisition Systems. Fabrice Le Goff - 14/02/ ISOTDAQ
Networking for Data Acquisition Systems Fabrice Le Goff - 14/02/2018 - ISOTDAQ Outline Generalities The OSI Model Ethernet and Local Area Networks IP and Routing TCP, UDP and Transport Efficiency Networking
More informationTCP /IP Fundamentals Mr. Cantu
TCP /IP Fundamentals Mr. Cantu OSI Model and TCP/IP Model Comparison TCP / IP Protocols (Application Layer) The TCP/IP subprotocols listed in this layer are services that support a number of network functions:
More informationCommunication System Models
Communication System Models 1 2 The Black Box View Block Size? Tx/Rx Ch Voltage? Char Set? Topology? Tx/Rx Many users of networks are unaware of details of network May view network as a black box service
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 informationMODULE: NETWORKS MODULE CODE: CAN1102C. Duration: 2 Hours 15 Mins. Instructions to Candidates:
BSc.(Hons) Computer Science with Network Security BEng (Hons) Telecommunications Cohort: BCNS/17B/FT Examinations for 2017-2018 / Semester 2 Resit Examinations for BCNS/15A/FT, BTEL/15B/FT & BTEL/16B/FT
More informationISO/OSI Model and Collision Domain NETWORK INFRASTRUCTURES NETKIT - LECTURE 1 MANUEL CAMPO, MARCO SPAZIANI
ISO/OSI Model and Collision Domain NETWORK INFRASTRUCTURES NETKIT - LECTURE 1 MANUEL CAMPO, MARCO SPAZIANI ISO/OSI Model ISO: International Organization for Standardization OSI: Open Systems Interconnection
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 informationECE4110 Internetwork Programming. Introduction and Overview
ECE4110 Internetwork Programming Introduction and Overview 1 EXAMPLE GENERAL NETWORK ALGORITHM Listen to wire Are signals detected Detect a preamble Yes Read Destination Address No data carrying or noise?
More informationCPEG514 Advanced Computer Networks. Atef Abu Salim University of Nizwa Spring 2013/2014
CPEG514 Advanced Computer Networks Atef Abu Salim University of Nizwa Spring 2013/2014 Today s Class Topics Course Syllabus Computer Networks LANs and WANs The Internet Protocols, Layers and Interfaces
More informationROYAL INSTITUTE OF INFORMATION & MANAGEMENT
ROYAL INSTITUTE OF INFORMATION & MANAGEMENT BASICS NETWORKING CHAPTER 1 Networking Basics to Networking Advantages of Networking Types of Network 1 Local Area Network (LAN) LAN features Basic LAN components
More informationTSIN02 - Internetworking
Lecture 4: Transport Layer Literature: Forouzan: ch 11-12 2004 Image Coding Group, Linköpings Universitet Lecture 4: Outline Transport layer responsibilities UDP TCP 2 Transport layer in OSI model Figure
More informationCopyleft 2005, Binnur Kurt. Objectives
1 ing Fundamentals Copyleft 2005, Binnur Kurt Objectives Define basic networking terms Describe some commonly used network applications Describe the main purposes and functions of computer networking Describe
More informationLecture 3 Protocol Stacks and Layering
Lecture 3 Protocol Stacks and ing Hui Zhang School of Computer Science Carnegie Mellon University 15-441 Networking, Fall 2007 http://www.cs.cmu.edu/~srini/15-441/f07/ 1 What is a Communication Network?
More informationChapter -4 OSI Reference Model
Chapter -4 OSI Reference Model Objectives Concept of Reference Model. OSI Reference Model Concept. Layers of OSI Reference Model. 4.1 Introduction Layered Architecture, Peer-to- Peer Processes, Interfaces
More informationBABU MADHAV INSTITUTE OF INFORMATION TECHNOLOGY, UTU 2017
5 years Integrated M.Sc (IT) Semester 3 Question Bank 060010310 DSE4 Computer Networks Unit 1 Introduction Short Questions 1. State the term data with respect to computer network. 2. What is data communication?
More informationInterconnecting Networks with TCP/IP. 2000, Cisco Systems, Inc. 8-1
Interconnecting Networks with TCP/IP 2000, Cisco Systems, Inc. 8-1 Objectives Upon completion of this chapter you will be able to perform the following tasks: Identify the IP protocol stack, its protocol
More informationCS-435 spring semester Network Technology & Programming Laboratory. Stefanos Papadakis & Manolis Spanakis
CS-435 spring semester 206 Network Technology & Programming Laboratory University of Crete Computer Science Department Stefanos Papadakis & Manolis Spanakis CS-435 Lecture #2 preview: Data Communications
More informationIntroduction to Internetworking
Introduction to Internetworking Introductory terms Communications Network Facility that provides data transfer services An internet Collection of communications networks interconnected by bridges and/or
More informationLink download full: Test Bank for Business Data Networks and Security 9th Edition by Panko https://digitalcontentmarket.org/download/business-data-networks-and-security-9thedition-by-panko/ Business Data
More informationOperating Systems. 16. Networking. Paul Krzyzanowski. Rutgers University. Spring /6/ Paul Krzyzanowski
Operating Systems 16. Networking Paul Krzyzanowski Rutgers University Spring 2015 1 Local Area Network (LAN) LAN = communications network Small area (building, set of buildings) Same, sometimes shared,
More informationCCNA Exploration1 Chapter 7: OSI Data Link Layer
CCNA Exploration1 Chapter 7: OSI Data Link Layer LOCAL CISCO ACADEMY ELSYS TU INSTRUCTOR: STELA STEFANOVA 1 Explain the role of Data Link layer protocols in data transmission; Objectives Describe how the
More informationLecture 17 Overview. Last Lecture. Wide Area Networking (2) This Lecture. Internet Protocol (1) Source: chapters 2.2, 2.3,18.4, 19.1, 9.
Lecture 17 Overview Last Lecture Wide Area Networking (2) This Lecture Internet Protocol (1) Source: chapters 2.2, 2.3,18.4, 19.1, 9.2 Next Lecture Internet Protocol (2) Source: chapters 19.1, 19.2, 22,1
More informationNetworking interview questions
Networking interview questions What is LAN? LAN is a computer network that spans a relatively small area. Most LANs are confined to a single building or group of buildings. However, one LAN can be connected
More informationCOMPONENTS OF DATA COMMUNICATION
COMPONENTS OF DATA COMMUNICATION ANALOG AND DIGITAL TRANSMISSION An analog signal is one that is continuous with respect to time and may take on any value within a given range of values. Eg Human voice.
More informationTSIN02 - Internetworking
Lecture 4: Transport Layer Literature: Forouzan: ch 11-12 2004 Image Coding Group, Linköpings Universitet Lecture 4: Outline Transport layer responsibilities UDP TCP 2 Transport layer in OSI model Figure
More informationAPPENDIX F THE TCP/IP PROTOCOL ARCHITECTURE
APPENDIX F THE TCP/IP PROTOCOL ARCHITECTURE William Stallings F.1 TCP/IP LAYERS... 2 F.2 TCP AND UDP... 4 F.3 OPERATION OF TCP/IP... 6 F.4 TCP/IP APPLICATIONS... 10 Copyright 2014 Supplement to Computer
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 informationINSTITUTE OF AERONAUTICAL ENGINEERING Autonomous Dundigal, Hyderabad
INSTITUTE OF AERONAUTICAL ENGINEERING Autonomous Dundigal, Hyderabad - 500 043 COMPUTER SCIENCE AND ENGINEERING TUTORIAL QUESTION BANK Name Code Class Branch COMPUTER NETWORKS A50515 Year 2017 18 Coordinator
More informationCS1302 / Computer Networks
CS1302 / Computer Networks Year/Sem : III/VI UNIT I- DATA COMMUNICATIONS 1. Define Data communication 2. List out the characteristics of data communication 3. What are the components of data communication?
More informationThis tutorial will help you in understanding IPv4 and its associated terminologies along with appropriate references and examples.
About the Tutorial Internet Protocol version 4 (IPv4) is the fourth version in the development of the Internet Protocol (IP) and the first version of the protocol to be widely deployed. IPv4 is described
More informationPeer entities. Protocol Layering. Protocols. Example
Peer entities Protocol Layering An Engineering Approach to Computer Networking Customer A and B are peers Postal worker A and B are peers Protocols A protocol is a set of rules and formats that govern
More informationEE 610 Part 2: Encapsulation and network utilities
EE 610 Part 2: Encapsulation and network utilities Objective: After this experiment, the students should be able to: i. Understand the format of standard frames and packet headers. Overview: The Open Systems
More informationInternet. Organization Addresses TCP/IP Protocol stack Forwarding. 1. Use of a globally unique address space based on Internet Addresses
Internet Organization Addresses TCP/IP Protocol stack Forwarding Jörg Liebeherr, 1998-2003 1 What defines the Internet? 1. Use of a globally unique address space based on Internet Addresses 2. Support
More informationTransport Layer. Gursharan Singh Tatla. Upendra Sharma. 1
Transport Layer Gursharan Singh Tatla mailme@gursharansingh.in Upendra Sharma 1 Introduction The transport layer is the fourth layer from the bottom in the OSI reference model. It is responsible for message
More informationOSI Transport Layer. objectives
LECTURE 5 OSI Transport Layer objectives 1. Roles of the Transport Layer 1. segmentation of data 2. error detection 3. Multiplexing of upper layer application using port numbers 2. The TCP protocol Communicating
More informationIntroduction to Networking. Operating Systems In Depth XXVII 1 Copyright 2017 Thomas W. Doeppner. All rights reserved.
Introduction to Networking Operating Systems In Depth XXVII 1 Copyright 2017 Thomas W. Doeppner. All rights reserved. Distributed File Systems Operating Systems In Depth XXVII 2 Copyright 2017 Thomas W.
More informationFundamentals of Networking. OSI & TCP/IP Model. Kuldeep Sonar 1
Fundamentals of Networking OSI & TCP/IP Model Kuldeep Sonar 1 Kuldeep Sonar 2 OSI Model Kuldeep Sonar 3 Application Layer Layer 7 provides an interface between a host s communication software and any necessary
More informationThe Internet Protocol (IP)
The Internet Protocol (IP) The Blood of the Internet (C) Herbert Haas 2005/03/11 "Information Superhighway is really an acronym for 'Interactive Network For Organizing, Retrieving, Manipulating, Accessing
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 informationThe Internetworking Problem. Internetworking. A Translation-based Solution
Cloud Cloud Cloud 1 The Internetworking Problem Internetworking Two nodes communicating across a network of networks How to transport packets through this heterogeneous mass? A B The Internetworking Problem
More informationGuide to TCP/IP, Third Edition. Chapter 3: Data Link and Network Layer TCP/IP Protocols
Guide to TCP/IP, Third Edition Chapter 3: Data Link and Network Layer TCP/IP Protocols 1 Objectives Understand the role that data link protocols, such as SLIP and PPP, play for TCP/IP Distinguish among
More informationSirindhorn International Institute of Technology Thammasat University
Name.............................. ID............... Section...... Seat No...... Thammasat University Final Exam: Semester, 205 Course Title: Introduction to Data Communications Instructor: Steven Gordon
More informationECE 650 Systems Programming & Engineering. Spring 2018
ECE 650 Systems Programming & Engineering Spring 2018 Networking Transport Layer Tyler Bletsch Duke University Slides are adapted from Brian Rogers (Duke) TCP/IP Model 2 Transport Layer Problem solved:
More informationIntroduction to TCP/IP networking
Introduction to TCP/IP networking TCP/IP protocol family IP : Internet Protocol UDP : User Datagram Protocol RTP, traceroute TCP : Transmission Control Protocol HTTP, FTP, ssh What is an internet? A set
More information