Lecture Outline. Lecture 2. OSI model and networking. The OSI model and networking. The OSI model and networking. The OSI model and networking

Size: px
Start display at page:

Download "Lecture Outline. Lecture 2. OSI model and networking. The OSI model and networking. The OSI model and networking. The OSI model and networking"

Transcription

1 Lecture 2 The OSI model Chapter 2, specifically pages Dave Novak School of Business Administration, University of Vermont Sources: 1) Network+ Guide to Networks, Dean ) Comer, Computer Networks and Internets, 2004 Lecture Outline Examine the seven layers of the OSI model in detail What the OSI model is and how it is used in networking Understand how protocols at different layers interact OSI s relationship to networking protocols Difference between MAC and IP address Define encapsulation OSI model and networking OSI model provides a universal framework for network communication Predates popularity of TCP/IP Defines relationships between various protocols, the specific services provided by protocols, and the layers of the model where the protocols operate The OSI model and networking Networked computers use many different protocols simultaneously Protocols are responsible for providing different types of network services and functions The OSI model and networking Different layers of OSI are responsible for doing different things by providing different types of services and functions The idea behind layering is to separate functionality and services by individual layer where there is no redundancy in the services / functions between layers Each layer of the OSI has a specific set of functions and services that are handled at that layer The OSI model and networking The OSI model is a standardized framework for sub-dividing communications system functionality and services into separate layers 1

2 OSI model The collection of networking protocols that operate at the various OSI layers are referred to as a protocol stack Protocols running on a networked computer work together to provide all services required by a particular application Services provided by the protocols are not redundant if a protocol at one layer provides a particular service, the protocols at the other layers do not provide the same service Protocols at different layers provide services to each other allowing interaction between adjoining layers OSI model Promotes open system communication OSI is a theoretical representation or framework for network services Does NOT prescribe hardware or software Does NOT describe how software programs on different computers interact, or how they interact with humans A Protocol Stack Protocol Interaction The collection of protocols that operate at the various layers of the OSI model are referred to as a protocol stack The protocols in the protocol stack work together to provide all services required by an application Protocols at the different layers perform specific functions that are NOT duplicated by other protocols at other layers Services performed at a particular layer of the OSI model at the sending computer are also performed (or undone) at the corresponding layer of the receiving computer The Session Layer (5) at the sending computer does not communicate directly with the Session Layer at the Receiving computer messages are passed down from the Session Layer (5) to the Transport Layer (4) and so on at the sending computer Messages are passed up from the Transport Layer (4) to the Session Layer (5) at the receiving computer The OSI Reference Model Interaction Between OSI Layers The Application Layer (7) is the top most layer it is NOT the same thing as an application MS Word is an example of an application MS Word is NOT a protocol that operates at the Application Layer (7) of the OSI FTP is an example of an Application Layer (7) protocol The is the bottom most layer of the OSI model it addresses the transmission of bits over a particular medium 2

3 OSI model OSI model Refer to the additional reading Webopedia definition of OSI I_Layers.asp The OSI model defines a framework for implementing networking services via specific PROTOCOLS (depending on the protocol stack being used) in seven layers Concerned with transmitting signals (representing raw bits) over a communication channel Transmitting signals via energy of some form or another Data are not organized into frames or packets at Layer 1 Addresses the nature of the medium and types of signals used Cable type: coaxial, twisted pair, fiber Signal type: Light pulses, electrical voltage, radio waves Why would one be concerned about the medium that is used? What difference does it make? Hardware dealing with transmission of signals is defined at layer 1 of the OSI Cables, hubs, repeaters Do not understand packets or frames only signals The NIC provides a physical connection to the network and bridges layers 1 and 2 Networking technologies may use a variety of physical layer options Ethernet (the most popular wired networking technology) supports a number of different physical layer options Designation Cable Type Topology Speed Max Segment Length 10Base5 RG-8 coaxial Bus 10 Mbps 500 meters 10Base2 RG-58 coaxial Bus 10 Mbps 185 meters 10BaseT CAT 3 UTP Star 10 Mbps 100 meters 100BaseFX 62.5 / 125 multimode fiber Star 100 Mbps 412 meters 100BaseTX CAT 5 UTP Star 100 Mbps 100 meters 3

4 Different types of media may be used to implement a given LAN technology For example, depending on the standard being followed, an Ethernet LAN may require coaxial, fiber, or twisted pair wiring Each standard has different topology and medium requirements Max length of cable What happens if you exceed max cable length standards? Type of connectors Bit rate (data transmission rate) Monitor data error rates Converts signals and streams of bits into frames and vice versa Creates and recognizes frame boundaries What is a frame and why is it important? The frame format is different for various networking technologies Ethernet Token Ring ATM Different Frame Formats Ethernet frame (IEEE 802.3) v2 length >= 1536 B Dest. Source Preamble SFD Length DATA FCS MAC MAC 8 bytes bytes 4 Token Ring frame (IEEE 802.5) length > 4500 B Start Access Frame Dest. Source DATA FCS End Frame Del. Control Control MAC MAC Del. Status >= Access control technique of various technologies defined at Layer 2 The way in which networked devices gain access to the medium, communicate with other devices, and transfer data differs based on the technology being used For example, the process two devices use to communicate over wireless is different from Ethernet 4

5 Error detection in the bit to frame conversion process Identifies and corrects frame errors Errors related to LAN communication Between 2 hosts The physical address or MAC address is contained in the frame header Provides conduit or link between the hardware and software on the computer and the physical network medium This is done via the NIC Sublayers In terms of network design Data Link Layer (2) is single most important layer in determining what hardware is used LAN technology and topology requires certain physical layer options and vice versa Implies access technique used LLC Interface to layer 3. Controls frame synchronization, flow control, and error checking MAC Interface to layer 1. Controls how PC accesses and transmits data specifies the Media Access Technique used Data link layer protocols designed to work locally (LAN or subnet centric) Other higher-layer protocols (at layers 3 and 4) are required for error detection and flow control in communicating remotely and over larger distances Hardware that recognizes frames operates at layer 2 of the OSI Switch, bridge Network Layer (3) Packages data/frames into IP datagrams Higher level, routable network addresses (like the IP address) are recognized and managed Hardware that recognizes network addresses (like IP addresses) works at Layer 3 Routers 5

6 Network Layer (3) Responsible for end-to-end communication Network Layer (3) Responsible for end-to-end communication How is end-to-end functionality different from functionality provided by Data Link Layer (2) protocols? Network Layer (3) Frames, Packets, and IP Datagrams Example protocol: IP Example services: network addressing, fragmentation/reassembly, routing What does routing mean? MAC and IP Address Comparison MAC address (physical address) IP address (network address) Transport Layer (4) Network layer (3) and Transport layer (4) protocols designed to work together as a pair TCP/IP Internet protocol stack SPX/IPX Layer 4 protocols provide services to complement Layer (3) TCP provides very specific services that IP does not designed to work together with each protocol providing unique services 6

7 Transport Layer (4) Provides messaging service for Session layer (5) and hides the underlying network from the upper layers Example protocols: TCP, UDP Example of Transport Layer services: flow control, multiplexing, retransmission, message sequencing Transport Layer (4) Provides end-to-end error control on the network How is this different from Layer 2 error control? How is this different from end-to-end communications provided at Layer 3? Encapsulation Encapsulation Each protocol adds headers to information it receives from the layer above it Upper Layers 4 When a datagram is encapsulated, the entire datagram is placed into the payload area of a specific frame format Transport Layer (4) adds its header to message and passes down to Network Layer (3) Network Layer adds its header in front of Transport Layer header and so on 3 2 Lower Layers (1 4) Layers 1 4 are called the LOWER layers Lower layers are concerned with proper transmission of data across the network Upper Layers (5 7) Layers 5 7 called the UPPER layers Upper layers are concerned with how different application communicate between different hosts Difficult to identify and separate upper layer protocols in some cases many applications bundle services provided at layers 5, 6, and 7 Example: WS FTP not only uses Layer 7 protocol FTP, but manages syntax and compression issues at Layer 6, and session management issues at Layer 5 Upper layer protocols/services know nothing about, or understand networking or addressing 7

8 Session Layer (5) Responsible for establishing, maintaining, and ending communication There are no separate Session Layer protocols Session Layer functions are integrated into other protocols that also include Presentation and Application Layer functions Set up, manage, and tear down sessions or connections between Presentation Layer (6) entities Session Layer (5) Coordinates communication and organizes into one of three categories: 1) Simplex only one node can transmit 2) Half duplex both nodes can transmit, but only one at a time. Once one node is finished transmitting data, the other node can transmit 3) Full duplex both nodes can transmit simultaneously without disrupting the other node Session Layer (5) Traffic cop for communications between two nodes on a network For Internet applications mapping between logical ports and sessions Presentation Layer (6) Primary role is to preserve meaning of information transmitted between systems Computers communicating on a network often use different syntax Ensures communication between entities is of a form both can understand Computers must negotiate a common syntax so they can choose a transfer syntax that they both have in common and both understand Semantics? Presentation Layer (6) Different applications and programming languages use different data types and different syntax Text-based languages based on sequence while visual languages are based on spatial layout and relationships between symbols Which statements in a program are acceptable to the compiler? Presentation Layer (6) Network perspective: applications send messages to each other Application perspective: messages contain specific types of data Many types of data use very standard (universal) formats MPEG for video JPEG for still images ASCII for text Not all data types have universal formats Not all computers format data types the same way 8

9 Presentation Layer (6) If needed, systems can select transfer syntax that provides additional services such as: Data compression and decompression Encryption and decryption Application Layer (7) Entrance point for applications to access the OSI model (structured networking framework) and use network resources NOT an application, but access to protocols that provide network services Coordinates network services Identify parties and make sure each can be reached Ensures communication resources exist (For example, is there are modem at the sender s computer?) Application Layer (7) Most Application Layer protocols provide services (such as mail, print, network management services) that applications (such as WS FTP, Internet Explorer, Outlook) use to access the network Application Layer protocols often include Session and Presentation Layer functions Typical protocol stack consists of 4 separate protocols that run at the application, transport, network, and data-link layers FTP, TCP, IP, specific Ethernet protocols Application Layer (7) FTP, TCP, IP, specific Ethernet protocols Example: WS_FTP (application software) uses FTP (a layer 7 protocol that ALSO performs layer 6 and 5 functions) running over TCP/IP (the layer 4 and 3 protocols Internet communication) and Ethernet LAN technology (layer 2 protocols specifying frame formats, error detection, addressing on the LAN) The upper layers using FTP are unaware of what type of transport protocol (4), what type of network protocol (3), and what type of LAN technology or data-link protocol (2) is being used Different lower layer protocols CAN be used the application is not aware of this, and doesn t need to deal with any lower layer functionality Lecture Summary Details of the OSI model KNOW the layers (A, P, S, T, N, D, P) and be able to describe basic services provided at each layer Using TCP/IP stack as example, on what layer does IP operate? What about TCP? 9

ก ก Information Technology II

ก ก Information Technology II ก ก 202103 Information Technology II ก ก ก ก ก (LAN), ก LAN, ก ก (LAN) ก ก ก LAN ก LAN ก LAN Topology Bus LAN Star LAN Ring LAN Wireless LAN Wireless LAN Wireless ก (LAN) ก ก ก LAN ก LAN WAN ก Random Access

More information

Data 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 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 information

Chapter -4 OSI Reference Model

Chapter -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 information

OSI 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 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 information

Layer 2 functionality bridging and switching

Layer 2 functionality bridging and switching Layer 2 functionality bridging and switching BSAD 141 Dave Novak Sources: Network+ Guide to Networks, Dean 2013 Overview Layer 2 functionality Error detection Bridges Broadcast and collision domains How

More information

Computer 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 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 information

1: Review Of Semester Provide an overview of encapsulation.

1: 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 information

Lecture (02) Network Protocols and Standards

Lecture (02) Network Protocols and Standards Lecture (02) Network Protocols and Standards Dr. Ahmed M. ElShafee 1 Agenda - - 2 Preface Protocols and standards are what make networks work together. Protocols make it possible for the various components

More information

Network Architecture Models

Network 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 information

OSI Reference Model. Computer Networks lab ECOM Prepared By : Eng. Motaz Murtaja Eng. Ola Abd Elatief

OSI Reference Model. Computer Networks lab ECOM Prepared By : Eng. Motaz Murtaja Eng. Ola Abd Elatief Islamic University of Gaza Faculty of Engineering Computer Engineering Department Computer Networks lab ECOM 4121 OSI Reference Model Prepared By : Eng. Motaz Murtaja Eng. Ola Abd Elatief May /2010 OSI

More information

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

The 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 information

E&CE 358: Tutorial 1. Instructor: Sherman (Xuemin) Shen TA: Miao Wang

E&CE 358: Tutorial 1. Instructor: Sherman (Xuemin) Shen TA: Miao Wang E&CE 358: Tutorial 1 Instructor: Sherman (Xuemin) Shen TA: Miao Wang Email: m59wang@uwaterloo.ca 1 About Tutorials TA: Miao Wang Office: EIT 3133; Tutorials: Th 4:30 5:20 pm Topics Supplementary knowledge

More information

M242 COMPUTER NETWORS AND SECURITY

M242 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 information

Lecture-4. TCP/IP-Overview:

Lecture-4. TCP/IP-Overview: Lecture-4 TCP/IP-Overview: The history goes back to ARPANET a research network sponsored by DoD US Govt. It eventually connected hundreds of universities and govt installations, using leased telephone

More information

The Network Access Layer. In This Lecture. Network Access Layer. Hour 3

The Network Access Layer. In This Lecture. Network Access Layer. Hour 3 The Network Access Layer Hour 3 In This Lecture Explain what the Network Access layer is Discuss how TCP/IP's Network Access layer relates to the OSI networking model Explain what a network architecture

More information

ROYAL INSTITUTE OF INFORMATION & MANAGEMENT

ROYAL 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 information

Network Review TEJ4M. SBrace

Network Review TEJ4M. SBrace Network Review TEJ4M SBrace Example of how the OSI Layers work using an e-mail sent from the computer on the left. Email sent from John: Meet me at Carl s 1:30 John Identify sender and intended receiver;

More information

Part3. Local Area Networks (LAN)

Part3. Local Area Networks (LAN) Part3 Local Area Networks (LAN) LAN Characteristics Small geographical area Relatively high data rate Single management Topologies Bus, star, ring Specifications at physical and data link layer mostly

More information

Networking Applications

Networking 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 information

CS1302 / Computer Networks

CS1302 / 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 information

Networking interview questions

Networking 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 information

IT 4504 Section 4.0. Network Architectures. 2008, University of Colombo School of Computing 1

IT 4504 Section 4.0. Network Architectures. 2008, University of Colombo School of Computing 1 IT 4504 Section 4.0 Network Architectures 2008, University of Colombo School of Computing 1 Section 4.1 Introduction to Computer Networks 2008, University of Colombo School of Computing 2 Introduction

More information

Network.... communication system for connecting end- systems. End-systems a.k.a. hosts PCs, workstations dedicated computers network components

Network.... 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 information

COMPONENTS OF DATA COMMUNICATION

COMPONENTS 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 information

Guide to Networking Essentials, 6 th Edition. Chapter 6: Network Reference Models and Standards

Guide to Networking Essentials, 6 th Edition. Chapter 6: Network Reference Models and Standards Guide to Networking Essentials, 6 th Edition Chapter 6: Network Reference Models and Standards Objectives Explain the OSI reference model layers and their relationship to hardware and software Explain

More information

Defining Networks with the OSI Model. Module 2

Defining 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 information

BABU MADHAV INSTITUTE OF INFORMATION TECHNOLOGY, UTU 2017

BABU 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 information

MEBS Utilities services M.Sc.(Eng) in building services Faculty of Engineering University of Hong Kong

MEBS Utilities services M.Sc.(Eng) in building services Faculty of Engineering University of Hong Kong Open System Interconnection MEBS 6000 2010 Utilities services ISO 1984: ISO Standard 7498 Information Processing System Open System Interconnection Basic Reference Model OSI is itself not a standard, but

More information

Computer Networks (Introduction to TCP/IP Protocols)

Computer Networks (Introduction to TCP/IP Protocols) Network Security(CP33925) Computer Networks (Introduction to TCP/IP Protocols) 부산대학교공과대학정보컴퓨터공학부 Network Type Elements of Protocol OSI Reference Model OSI Layers What we ll learn today 2 Definition of

More information

Data Communication and Network. Introducing Networks

Data 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 information

Objectives. 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 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 information

ISO/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 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 information

Introductory to Computer Networks Local Area Networks. Lecture 16 Fall Isfahan University of technology Dr.

Introductory to Computer Networks Local Area Networks. Lecture 16 Fall Isfahan University of technology Dr. Introductory to Computer Networks Local Area Networks Lecture 16 Fall 2010 Isfahan University of technology Dr. Faramarz Hendessi What is a LAN? Local area means: Private ownership freedom from regulatory

More information

Computer Communication & Networks / Data Communication & Computer Networks Week # 03

Computer 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 information

CCNA Exploration1 Chapter 7: OSI Data Link Layer

CCNA 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 information

Fundamentals of Networking. OSI & TCP/IP Model. Kuldeep Sonar 1

Fundamentals 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 information

CIS 551 / TCOM 401 Computer and Network Security. Spring 2007 Lecture 7

CIS 551 / TCOM 401 Computer and Network Security. Spring 2007 Lecture 7 CIS 551 / TCOM 401 Computer and Network Security Spring 2007 Lecture 7 Announcements Reminder: Project 1 is due on Thursday. 2/1/07 CIS/TCOM 551 2 Network Architecture General blueprints that guide the

More information

CS-461 Internetworking. Dr. Mohamed Aboutabl

CS-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 information

Communication Networks

Communication Networks Communication Networks Nicholas Honeth (nicholash@ics.kth.se) Contents of the series Lecture 10 - Recap of the networks we ve seen so far - OSI model - Circuit and packet switching - Physical media Lecture

More information

Lesson 1: Network Communications

Lesson 1: Network Communications Lesson 1: Network Communications This lesson introduces the basic building blocks of network communications and some of the structures used to construct data networks. There are many different kinds of

More information

ITEC 3800 Data Communication and Network. Introducing Networks

ITEC 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 information

Number: Passing Score: 750 Time Limit: 120 min File Version: 1.0. Microsoft Exam Name: Identity with Windows Server 2016 (beta)

Number: Passing Score: 750 Time Limit: 120 min File Version: 1.0. Microsoft Exam Name: Identity with Windows Server 2016 (beta) 70-742 Number: 70-742 Passing Score: 750 Time Limit: 120 min File Version: 1.0 Microsoft 70-742 Exam Name: Identity with Windows Server 2016 (beta) Sections 1. Understanding Local Area Networks 2. Defining

More information

Data Link Protocols. TCP/IP Suite and OSI Reference Model

Data Link Protocols. TCP/IP Suite and OSI Reference Model Data Link Protocols Relates to Lab. This module covers data link layer issues, such as local area networks (LANs) and point-to-point links, Ethernet, and the Point-to-Point Protocol (PPP). 1 TCP/IP Suite

More information

Raj Jain. The Ohio State University Columbus, OH

Raj Jain. The Ohio State University Columbus, OH Columbus, OH 43210 Jain@CIS.Ohio-State.Edu http://www.cis.ohio-state.edu/~jain/ 3-1 Overview ISO/OSI Reference Model TCP/IP Reference Model Differences between ISO and TCP Ethernet/IEEE 802.3 LANs Interconnecting

More information

ELC 537 Communication Networks

ELC 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 information

Architectures of Communication Subsystems

Architectures 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 information

Internetwork Basic. Possible causes of LAN traffic congestion are

Internetwork Basic. Possible causes of LAN traffic congestion are Internetworking 1 C H A P T E R 2 Internetworking Basics Internetworking Model The OSI Reference Model Ethernet Networking Wireless Networking Data Encapsulation Topic 3 1 Internetwork Basic 4 Possible

More information

NT1210 Introduction to Networking. Unit 5:

NT1210 Introduction to Networking. Unit 5: NT1210 Introduction to Networking Unit 5: Chapter 5, Ethernet LANs 1 Objectives Identify the major needs and stakeholders for computer networks and network applications. Identify the classifications of

More information

Special expressions, phrases, abbreviations and terms of Computer Networks

Special expressions, phrases, abbreviations and terms of Computer Networks access access point adapter Adderssing Realm ADSL (Asymmetrical Digital Subscriber Line) algorithm amplify amplitude analog antenna application architecture ARP (Address Resolution Protocol) AS (Autonomous

More information

Introducing Cisco Data Center Networking

Introducing Cisco Data Center Networking Introducing Cisco Data Center Networking Cisco 640-911 Dumps Available Here at: /cisco-exam/640-911-dumps.html Enrolling now you will get access to 209 questions in a unique set of 640-911 dumps Question

More information

Contents. Introduction to Networking. Preface...i. Introduction... xix

Contents. Introduction to Networking. Preface...i. Introduction... xix Contents Introduction to Networking Introduction to Networking Preface...i Key Topics...i Course Objectives...ii Pedagogical Features...ii Learning Objectives, Unit Summaries, Discussion Questions, and

More information

System Programming. Introduction to computer networks

System Programming. Introduction to computer networks Content : by Dr. B. Boufama School of Computer Science University of Windsor Instructor: Dr. A. Habed adlane@cs.uwindsor.ca http://cs.uwindsor.ca/ adlane/60-256 Content Content 1 Introduction to Computer

More information

MTA_98-366_Vindicator930

MTA_98-366_Vindicator930 MTA_98-366_Vindicator930 Number: 98-366 Passing Score: 700 Time Limit: 45 min File Version: 1.0 http://www.gratisexam.com/ Microsoft Technology Associate Networking Fundamentals MTA 98-366 Exam A QUESTION

More information

Introduction to Open System Interconnection Reference Model

Introduction 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 information

Section 3.1: Network Adapters

Section 3.1: Network Adapters Section 3.1: Network Adapters This section examines using a network adapter (network interface card or NIC) to connect a host to the network medium. Students will become familiar with the function of:

More information

Fundamentals of Networking Introduction to Networking Devices

Fundamentals of Networking Introduction to Networking Devices Fundamentals of Networking Introduction to Networking Devices Kuldeep Sonar 1 NIC (Network Interface Card) A network interface provides connectivity from an end-user PC or laptop to the public network.

More information

ES623 Networked Embedded Systems

ES623 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 information

Cross Layer Protocol Design. Radio Communication III

Cross Layer Protocol Design. Radio Communication III Cross Layer Protocol Design Radio Communication III The layered world of protocols The ISO OSI model OSI model Introduction» The open systems interconnection reference model (OSI model) describes a layered

More information

Layering in Networked computing. OSI Model TCP/IP Model Protocols at each layer

Layering in Networked computing. OSI Model TCP/IP Model Protocols at each layer Layering in Networked computing OSI Model TCP/IP Model Protocols at each layer Learning outcomes Understand the need of layering in Networked computing Understand the OSI model and the tcp/ip model Understand

More information

FINAL EXAM REVIEW PLEASE NOTE THE MATERIAL FROM LECTURE #16 at the end. Exam 1 Review Material

FINAL EXAM REVIEW PLEASE NOTE THE MATERIAL FROM LECTURE #16 at the end. Exam 1 Review Material FINAL EXAM REVIEW PLEASE NOTE THE MATERIAL FROM LECTURE #16 at the end Chapters in the book 1, 2, 3, 5, 6 Exam 1 Review Material Topics You are also responsible for the reading in the chapters understanding

More information

A LAN is a high-speed data network that covers a relatively small geographic area. It typically connects workstations, personal computers, printers,

A 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 information

Time : 3 hours. Full Marks: 70. The figures in the margin indicate full marks. Answer from all the Groups are directed. Group A.

Time : 3 hours. Full Marks: 70. The figures in the margin indicate full marks. Answer from all the Groups are directed. Group A. COPYRIGHT RESERVED End Sem (III) MCA (XVIII) 2017 Time : 3 hours Full Marks: 70 Candidates are required to give their answers in their own words as far as practicable. The figures in the margin indicate

More information

RAJIV GANDHI COLLEGE OF ENGINEERING AND TECHNOLOGY

RAJIV GANDHI COLLEGE OF ENGINEERING AND TECHNOLOGY RAJIV GANDHI COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF COMPUTER SCIENCE AND ENGINEERING QUESTION BANK SUBJECT NAME: COMPUTER NETWORKS SUBJECT CODE: CST52 UNIT-I 2 MARKS 1. What is Network? 2.

More information

Lecture 3 Protocol Stacks and Layering

Lecture 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 information

Communicating over the Network

Communicating 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 information

Computer Networks and reference models. 1. List of Problems (so far)

Computer Networks and reference models. 1. List of Problems (so far) Computer s and reference models Chapter 2 1. List of Problems (so far) How to ensure connectivity between users? How to share a wire? How to pass a message through the network? How to build Scalable s?

More information

Computer Networks รศ.ดร.อน นต ผลเพ ม. Assoc. Prof. Anan Phonphoem, Ph.D. Kasetsart University, Bangkok, Thailand

Computer 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 information

Layered Architecture

Layered Architecture CS311: DATA COMMUNICATION Layered Architecture 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/

More information

CS3600 SYSTEMS AND NETWORKS

CS3600 SYSTEMS AND NETWORKS CS3600 SYSTEMS AND NETWORKS NORTHEASTERN UNIVERSITY Lecture 17: Internet architecture Prof. Alan Mislove (amislove@ccs.neu.edu) Slides used with permissions from Edward W. Knightly, T. S. Eugene Ng, Ion

More information

Computer Communications and Network Basics p. 1 Overview of Computer Communications and Networking p. 2 What Does Computer Communications and

Computer Communications and Network Basics p. 1 Overview of Computer Communications and Networking p. 2 What Does Computer Communications and Computer Communications and Network Basics p. 1 Overview of Computer Communications and Networking p. 2 What Does Computer Communications and Networking Technologies Mean? p. 3 What Is a Computer Network?

More information

Other Protocols. Arash Habibi Lashkari

Other Protocols. Arash Habibi Lashkari LAN Technology Other Protocols Arash Habibi Lashkari PHD of Computer Science - Information Security July 2010 Other Protocols Outlines: FDDI: Fiber Distributed Data Interface Token Ring: IEEE 802.5 LAN

More information

Chapter 2 Communicating Over the Network

Chapter 2 Communicating Over the Network Chapter 2 Communicating Over the Network Elements of Communication Communicating the Messages Continuous stream of bits 00101010100101010101010101010101010 I have to wait Single communications (e.g. video,

More information

Cisco Cisco Certified Network Associate (CCNA)

Cisco 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 information

IEEE 802 LANs SECTION C

IEEE 802 LANs SECTION C IEEE 802 LANs SECTION C Outline of the Lecture Basic characteristics of LAN Topology Transmission Media MAC IEEE 802 LANs 802.3 - CSMA/CD based (Ethernet) 802.4 Token bus-based 802.5 Token ring-based Comparison

More information

Peer entities. Protocol Layering. Protocols. Example

Peer 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 information

Ethernet Basics. based on Chapter 4 of CompTIA Network+ Exam Guide, 4 th ed., Mike Meyers

Ethernet Basics. based on Chapter 4 of CompTIA Network+ Exam Guide, 4 th ed., Mike Meyers Ethernet Basics based on Chapter 4 of CompTIA Network+ Exam Guide, 4 th ed., Mike Meyers Ethernet Basics History Ethernet Frames CSMA/CD Obsolete versions 10Mbps versions Segments Spanning Tree Protocol

More information

Network Models. Behrouz A. Forouzan Data communication and Networking Fourth edition

Network 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 information

Imi :... Data:... Nazwisko:... Stron:...

Imi :... Data:... Nazwisko:... Stron:... Imi :.................................................... Data:....................... Nazwisko:............................................... Stron:...................... 1. Which of the following protocols

More information

NETWORK SECURITY ITEC 435

NETWORK SECURITY ITEC 435 NETWORK SECURITY ITEC 435 Agenda Chapter 2: Introduction to Networking Introduction to Networking Networking Fundamentals Reasons to Network Getting the Message Across Analog Information on an Analog Medium

More information

Data Communication. Chapter # 1: Introduction. By: William Stalling

Data Communication. Chapter # 1: Introduction. By: William Stalling Data Communication Chapter # 1: By: Introduction William Stalling Data Communication The exchange of data between two devices via some form of transmission medium such as cable wire. For data communications

More information

THE 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. 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 information

IT4405 Computer Networks (Compulsory)

IT4405 Computer Networks (Compulsory) IT4405 Computer Networks (Compulsory) INTRODUCTION This course provides a comprehensive insight into the fundamental concepts in data communications, computer network systems and protocols both fixed and

More information

10- and 100-Mbps Ethernet

10- and 100-Mbps Ethernet Ethernet Basics 10-Mbps Ethernet Three 10-Mbps Ethernet standards: 10BASE5 10BASE2 10BASE-T 10BASE2 and 10BASE5 were around more than 20 years and have been replaced by newer alternatives 10BASE-T s use

More information

Computer and Network Security

Computer and Network Security CIS 551 / TCOM 401 Computer and Network Security Spring 2009 Lecture 6 Announcements First project: Due: 6 Feb. 2009 at 11:59 p.m. http://www.cis.upenn.edu/~cis551/project1.html Plan for Today: Networks:

More information

Computer Networking. Chapter #1. Dr. Abdulrhaman Alameer

Computer Networking. Chapter #1. Dr. Abdulrhaman Alameer Computer Networking Chapter #1 Dr. Abdulrhaman Alameer What is Computer Network? It is a collection of computers and devices interconnected by communications channels that facilitate communications among

More information

QUESTION BANK EVEN SEMESTER

QUESTION BANK EVEN SEMESTER Fatima Michael College of Engineering and Technology DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING QUESTION BANK EVEN SEMESTER SUB CODE & NAME: EC2352 COMPUTER NETWORKS YEAR / SEM: III / VI Staff

More information

Copyleft 2005, Binnur Kurt. Objectives

Copyleft 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 information

Area Covered is small Area covered is large. Data transfer rate is high Data transfer rate is low

Area Covered is small Area covered is large. Data transfer rate is high Data transfer rate is low Chapter 15 Networking Concepts 1. Define networking. It is the interconnection of independent computing devices for sharing of information over shared medium. 2. What is the need for networking? / What

More information

QUESTION BANK ENGINEERS ACADEMY. Computer Networks Computer Network Basics Segentation is done in. 12. Session layer is used for

QUESTION BANK ENGINEERS ACADEMY. Computer Networks Computer Network Basics Segentation is done in. 12. Session layer is used for Computer Networks Computer Network Basics 1 QUESTION BANK 1. Segentation is done in (a) transport layer (c) data link layer 2. Network layer activities are: (d) physical layer (a) logical addressing (b)

More information

Data Communication & Computer Networks MCQ S

Data Communication & Computer Networks MCQ S Data Communication & Computer Networks MCQ S 1. The translates internet domain and host names to IP address. a) domain name system b) routing information protocol c) network time protocol d) internet relay

More information

Chapter 15 Local Area Network Overview

Chapter 15 Local Area Network Overview Chapter 15 Local Area Network Overview LAN Topologies Bus and Tree Bus: stations attach through tap to bus full duplex allows transmission and reception transmission propagates throughout medium heard

More information

Test Bank for A Guide to Designing and Implementing Local And Wide Area Networks 2nd Edition by Palmer and Sinclair

Test Bank for A Guide to Designing and Implementing Local And Wide Area Networks 2nd Edition by Palmer and Sinclair Test Bank for A Guide to Designing and Implementing Local And Wide Area Networks 2nd Edition by Palmer and Sinclair Link download full: https://testbankservice.com/download/test-bank-for-aguide-to-designing-and-implementing-local-and-wide-area-networks-2ndedition-by-palmer-and-sinclair/

More information

CMPE 150/L : Introduction to Computer Networks. Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 18

CMPE 150/L : Introduction to Computer Networks. Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 18 CMPE 150/L : Introduction to Computer Networks Chen Qian Computer Engineering UCSC Baskin Engineering Lecture 18 1 Final project demo Please do the demo THIS week to the TAs. Or you are allowed to use

More information

Communication Networks

Communication 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 information

OSI and TCP/IP Models

OSI and TCP/IP Models EECS 3214 Department of Electrical Engineering & Computer Science York University 18-01-08 12:12 1 OSI and / Models 2 1 / Encapsula5on (Packet) (Frame) 3 / Model and Example Protocols A list of protocols

More information

KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING B.E. ECE UNIT I DATA COMMUNICATION PART A

KINGS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING B.E. ECE UNIT I DATA COMMUNICATION PART A KINGS CS1302 / COMPUTER NETWORKS COLLEGE OF ENGINEERING DEPARTMENT OF ELECTRONICS AND COMMUNICATION ENGINEERING B.E. ECE SUB.CODE : CS1302 BRANCH / YEAR / SEM: ECE / III / VI SUB.NAME : COMPUTER NETWORKS

More information

Network Protocols. Terms you ll need to understand: Techniques you ll need to master:

Network Protocols. Terms you ll need to understand: Techniques you ll need to master: 3 Network Protocols Terms you ll need to understand: OSI Reference Model Application layer Presentation layer Session layer Transport layer Network layer Data Link layer Physical layer IEEE 802 specifications

More information

EE-379 Embedded Systems and Applications Introduction to Ethernet

EE-379 Embedded Systems and Applications Introduction to Ethernet EE-379 Embedded Systems and Applications Introduction to Ethernet Cristinel Ababei Department of Electrical Engineering, University at Buffalo Spring 2013 Note: This course is offered as EE 459/500 in

More information

Identify the features of network and client operating systems (Windows, NetWare, Linux, Mac OS)

Identify the features of network and client operating systems (Windows, NetWare, Linux, Mac OS) Course Outline Network+ Duration: 5 days (30 hours) Learning Objectives: Install and configure a network card Define the concepts of network layers Understand and implement the TCP/IP protocol Install

More information

Internet Architecture and Protocol

Internet Architecture and Protocol Internet Architecture and Protocol Set# 03 Local Area Networks Delivered By: Engr Tahir Niazi Layer Reference to Protocol Application Presentation Session Application FTP, Telnet, SMTP, HTTP, SNMP.. Transport

More information