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description: January 29, 2024
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# OSI Model

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
