CH2 SV_OSI_Part1

Chapter 2, Part 1

1.0x

CH2 SV_OSI_Part1

By S V
Created 3 years ago

Duration 0:15:49
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Chapter 2, Part 1
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Slide Content
  1. Slide 1

    • The OSI and TCP/IP Models
    • Lesson 2
  2. Objectives

    Slide 2 - Objectives

    • Exam Objective Matrix
    • Technology Skill Covered
    • Exam Objective
    • Exam Objective Number
    • Introduction to the OSI Model
    • Compare the layers of the OSI and TCP/IP models.
    • OSI model:
    • Layer 1—Physical
    • Layer 2—Data Link
    • Layer 3—Network
    • Layer 4—Transport
    • Layer 5—Session
    • Layer 6—Presentation
    • Layer 7—Application
    • Classify how applications, devices, and protocols relate to the OSI model layers.
    • IP address
    • Frames
    • Packets
    • Cable
    • 1.1
    • 1.2
  3. Objectives

    Slide 3 - Objectives

    • Exam Objective Matrix
    • Technology Skill Covered
    • Exam Objective
    • Exam Objective Number
    • TCP/IP Model
    • Compare the layers of the OSI and TCP/IP models.
    • TCP/IP model:
    • • Network Interface Layer
    • • Internet Layer
    • • Transport Layer
    • • Application Layer
    • • (Also described as: Link Layer, Internet
    • Layer, Transport Layer, Application Layer)
    • 1.1
  4. Introduction to the OSI Model

    Slide 4 - Introduction to the OSI Model

    • OSI stands for Open Systems Interconnection
    • Created by International Standards Organization
    • Was created as a framework and reference model to explain how different networking technologies work together and interact
    • Is not a standard that networking protocols must follow
  5. What the OSI Model Looks Like

    Slide 5 - What the OSI Model Looks Like

    • Each layer has specific functions it is responsible for
    • All layers worktogether in thecorrect order tomove data arounda network
  6. OSI Model Layer Mnemonics(umm – how do I remember these layers?)

    Slide 6 - OSI Model Layer Mnemonics(umm – how do I remember these layers?)

    • imgkid.com
    • http://www.certificationkits.com/cisco-certification/Cisco-CCNA-The-OSI-Model.html
  7. Encapsulation/De-encapsulation

    Slide 7 - Encapsulation/De-encapsulation

    • The process of moving data between layers of the OSI Model
    • Encapsulation:Data => segment =>packet => frame => bits
    • De-encapsulation:Bits => frame => packet =>segment => data
  8. How Data Is Referred to in the OSI Model

    Slide 8 - How Data Is Referred to in the OSI Model

    • Data
    • Application, Presentation, and Session layers
    • Segment
    • Transport layer
    • Packet
    • Networking layer
    • Frame
    • Bits
    • Data Link layer
    • Physical layer
  9. Physical Layer of OSI Model

    Slide 9 - Physical Layer of OSI Model

    • Deals with all aspects of physically moving data from one computer to the next
    • Converts data from the upper layers into 1s and 0s for transmission over media
    • Defines how data is encoded onto the media used to transmit the data
    • Defined on this layer: Cable standards, wireless standards, and fiber optic standards
    • www.soopertutorials.com
  10. Physical Layer of OSI Model (Continued)

    Slide 10 - Physical Layer of OSI Model (Continued)

    • Device example: Hub
    • Used to transmit data
    • Copper wiring, fiber optic cable, radio frequencies, anything that can be used to transmit data is defined on the Physical layer of the OSI Model
    • www.learn44.com
  11. Data Link Layer of OSI Model

    Slide 11 - Data Link Layer of OSI Model

    • Is responsible for moving frames from node to node or computer to computer
    • Can move frames from one adjacent computer to another, cannot move frames across routers
    • Encapsulation = frame
    • Requires MAC address. or physical address
    • Protocols defined include Ethernet Protocol and Point-to-Point Protocol (PPP)
  12. Data Link Layer of OSI Model (Continued)

    Slide 12 - Data Link Layer of OSI Model (Continued)

    • Device example: Switch
    • Two sublayers: Logical Link Control (LLC) and the Media Access Control (MAC)
  13. LLC and MAC Sublayers

    Slide 13 - LLC and MAC Sublayers

    • Logical Link Control (LLC)
    • Data Link layer addressing, flow control, address notification, error correction
    • Media Access Control (MAC)
    • Determines which computer has access to the network media at any given time
    • Determines where one frame ends and the next one starts, called frame synchronization