Understanding the OSI Model

The video explains the OSI Model, a framework for understanding network communication through seven layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. Each layer has specific functions, from handling hardware connections to providing user services. The video details each layer's role and provides an example of how data travels through these layers during a web browsing session.

What is the primary purpose of the OSI Model?

• To manage user accounts on a network

• To create software applications

• To design hardware components for networks

• To provide a framework for understanding network protocols

Which layer of the OSI Model is responsible for converting data into signals for transmission?

• Data Link Layer

• Network Layer

• Physical Layer

• Transport Layer

What does the Data Link Layer use to ensure data is sent to the correct device?

• IP addresses

• Domain names

• Port numbers

• MAC addresses

Which layer is responsible for determining the best path for data to travel across networks?

• Transport Layer

• Session Layer

• Application Layer

• Network Layer

What protocol is commonly used at the Transport Layer for reliable data transmission?

• HTTP

• UDP

• TCP

• SMTP

Which layer manages the establishment and termination of communication sessions?

• Presentation Layer

• Session Layer

• Data Link Layer

• Network Layer

What is a key function of the Presentation Layer?

• Routing data packets

• Encrypting and compressing data

• Establishing network connections

• Managing user sessions

Which layer is directly responsible for providing network services to end-user applications?

• Data Link Layer

• Session Layer

• Transport Layer

• Application Layer

During a web browsing session, which protocol is used by the browser to fetch a webpage?

• TCP

• HTTP

• SMTP

• FTP

In the OSI Model, which layer is responsible for formatting and encoding data for secure communication?

• Physical Layer

• Network Layer

• Presentation Layer

• Session Layer