OSI Model

January 29, 2024

Task 1: What is the OSI Model?

  • What does the "OSI" in "OSI Model" stand for?

    • Open Systems Interconnection

  • How many layers (in digits) does the OSI model have?

    • 7

  • What is the key term for when pieces of information get added to data?

    • encapsulation

Task 2: Layer 7 - Application

  • What is the name of this Layer?

    • application

  • What is the technical term that is given to the name of the software that users interact with?

    • graphical user interface

Task 3: Layer 6 - Presentation

  • What is the name of this Layer?

    • presentation

  • What is the main purpose that this Layer acts as?

    • translator

Task 4: Layer 5 - Session

  • What is the name of this Layer?

    • session

  • What is the technical term for when a connection is successfully established?

    • session

  • What is the technical term for "small chunks of data"?

    • packets

Task 5: Layer 4 - Transport

  • What is the name of this Layer?

    • transport

  • What does TCP stand for?

    • Transmission control protocol

  • What does UDP stand for?

    • User datagram protocol

  • What protocol guarantees the accuracy of data?

    • TCP

  • What protocol doesn't care if data is received or not by the other devices?

    • UDP

  • What protocol would an application such as an email client use?

    • TCP

  • What protocol would an application that downloads files use?

    • TCP

  • What protocol would an application that streams video use?

    • UDP

Task 6: Layer 3 - Network

  • What is the name of this Layer?

    • Network

  • Will packets take the most optimal route across a network? (Y/N)

    • Y

  • What does the acronym "OSPF" stand for?

    • Open Shortest Path First

  • What does the acronym "RIP" stand for?

    • Routing Information Protocol

  • What type of addresses are dealt with at this layer?

    • IP addresses

Task 7: Layer 2 - Data Link

  • What is the name of this Layer?

    • Data Link

  • What is the name of the piece of hardware that all networked devices come with?

    • Network interface card

Task 8: Layer 1 - Physical

  • What is the name of this Layer?

    • Physical

  • What is the name of the numbering system that is both 0's and 1's?

    • Binary

  • What is the name of the cables that are used to connect devices?

    • Ethernet cable

Task 9: Practical - OSI Game

  • Escape the dungeon to retrieve the flag. What is the flag?

    • THM

Task 10: Continue Your Learning: Packets & Frames

  • Done

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