OSI Model - Simple

Question 1

Layer 1?

Answer 1

Physical - Sends raw bits over cables or wireless (wires, Wi-Fi, hardware)

Question 2

Layer 2?

Answer 2

Data Link – Sends data to the right device (MAC address, error checking)

Question 3

Layer 3?

Answer 3

Network – Finds the best path (IP addresses, routing)

Question 4

Layer 4?

Answer 4

Transport – Delivers data reliably (TCP/UDP)

Question 5

Layer 5?

Answer 5

Session – Starts, manages, and ends connections

Question 6

Layer 6?

Answer 6

Presentation – Formats and encrypts data (like .jpg, .mp3)

Question 7

Layer 7?

Answer 7

Application – Apps use this (e.g., email, web browsing)