OSI Model Multiple Choice Questions: Introduction to Computer Science

📚 Quick Study Guide

🌍 OSI Model Definition: The Open Systems Interconnection (OSI) model is a conceptual framework that standardizes the functions of a telecommunication or computing system into seven abstraction layers. 📦 Layer 7 - Application:
• 🤝 Provides network services to applications (e.g., HTTP, SMTP, FTP).
📧 Layer 6 - Presentation:
• 🎁 Handles data representation, encryption, and decryption.
Session:
• 🎫 Manages connections between applications.
🔗 Layer 4 - Transport:
• 🚚 Provides reliable and unreliable data delivery (e.g., TCP, UDP).
🌐 Layer 3 - Network:
• 🗺️ Handles routing of data packets (IP addresses)
🔗 Layer 2 - Data Link:
• 🖧 Provides error-free transmission of data frames between two nodes (MAC addresses).
📡 Layer 1 - Physical:
• 🔌 Represents the physical connection (cables, wireless) and transmits raw bit streams.

🧪 Practice Quiz

1. Which layer of the OSI model is responsible for providing reliable, connection-oriented data transmission?
   1. Application
   2. Transport
   3. Network
   4. Data Link
2. At which layer of the OSI model do routers primarily operate?
   1. Transport
   2. Data Link
   3. Network
   4. Physical
3. Which layer is responsible for defining the physical characteristics of the network, such as voltage levels and data rates?
   1. Data Link
   2. Physical
   3. Network
   4. Session
4. Which layer handles encryption and decryption of data?
   1. Application
   2. Presentation
   3. Session
   4. Transport
5. Which layer is responsible for managing sessions between applications?
   1. Transport
   2. Session
   3. Presentation
   4. Application
6. Which layer uses MAC addresses?
   1. Network
   2. Data Link
   3. Transport
   4. Physical
7. Which layer provides services like email and file transfer?
   1. Session
   2. Presentation
   3. Application
   4. Transport