402 - 7 Layers of OSI model

Question 1

Physical Layer (Layer 1)

Answer 1

Transmits raw bits over physical medium (cables, radio waves). Focuses on hardware and electrical signals.

Question 2

Data Link Layer (Layer 2)

Answer 2

Provides MAC addressing, error detection, and manages access to the physical medium.

Question 3

Network Layer (Layer 3)

Answer 3

Handles routing of packets and logical addressing (IP addresses) between different networks.

Question 4

Transport Layer (Layer 4)

Answer 4

Ensures reliable data delivery, manages flow control, error handling, and packet sequencing.

Question 5

Session Layer (Layer 5)

Answer 5

Establishes, manages, and terminates sessions between applications.

Question 6

Presentation Layer (Layer 6)

Answer 6

Translates, encrypts, compresses, and formats data for the Application Layer.

Question 7

Application Layer (Layer 7)

Answer 7

Provides network services to end-user applications (like web browsing, email, file transfer).