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Difficulty: EasyOSI Model Layers and Functions

Match each OSI model layer to its primary network responsibility.

  • Physical Layer (Layer 1)Transmission of raw bit streams over media
  • Data Link Layer (Layer 2)Node-to-node framing and physical MAC addressing
  • Network Layer (Layer 3)Logical IP addressing and packet routing
  • Transport Layer (Layer 4)End-to-end communication management and flow control

Answer

Physical Layer matches raw bit stream transmission; Data Link Layer matches node-to-node framing and MAC addressing; Network Layer matches logical IP addressing and packet routing; Transport Layer matches end-to-end communication management and flow control.
Each layer of the OSI model performs a distinct set of tasks: Physical Layer transfers raw electrical/optical bits; Data Link Layer organizes bits into frames and uses physical MAC addresses; Network Layer handles logical IP addressing and inter-network routing; Transport Layer governs end-to-end transport, port allocation, and flow control.

Step-by-Step Solution

1
Identify the function of Layer 1.
The Physical Layer deals directly with bit transmission across cables or signals.
Hardware standards and physical media operate at Layer 1.
2
Identify the function of Layer 2.
The Data Link Layer packages data into frames and uses physical hardware addresses (MAC).
Switches and network interface cards operate at Layer 2 for local segment communications.
3
Identify the function of Layer 3.
The Network Layer uses IP addressing to route data packets across network boundaries.
Routers operate at Layer 3 to perform inter-network routing.
4
Identify the function of Layer 4.
The Transport Layer manages end-to-end data transfer, segmentation, and connection reliability.
TCP and UDP operate at Layer 4 to manage session data delivery.

Key Concept

OSI Model Layers and Functions
Estimated Time:1m 0s
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OSI Model Layers and Functions

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