OSI model seven layers in Computer Networks - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Identify the correct order of OSI layers from bottom to top

Which of the following lists the OSI model layers in the correct order starting from the lowest (closest to physical hardware) to the highest (closest to the user)?

A Physical, Data Link, Network, Transport, Session, Presentation, Application

B Application, Presentation, Session, Transport, Network, Data Link, Physical

C Physical, Network, Data Link, Transport, Session, Presentation, Application

D Data Link, Physical, Network, Transport, Session, Presentation, Application

💡 Hint

Remember, the Physical layer is the lowest layer dealing with hardware signals.

The OSI model layers from bottom to top are: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This order reflects how data moves from hardware signals up to user applications.

📋 Factual

intermediate

Which OSI layer is responsible for routing packets?

In the OSI model, which layer is primarily responsible for determining the path data takes across networks?

A Transport layer

B Session layer

C Data Link layer

D Network layer

💡 Hint

Think about which layer handles logical addressing and path selection.

The Network layer is responsible for routing packets between devices across different networks. It handles logical addressing and path determination.

🚀 Application

advanced

Determine which OSI layer handles encryption and decryption

If a network device encrypts data before sending and decrypts it upon receiving, which OSI layer is it operating at?

A Transport layer

B Session layer

C Presentation layer

D Application layer

💡 Hint

This layer formats data and manages encryption.

The Presentation layer is responsible for data translation, encryption, and compression. It ensures data is in a usable format and secures it through encryption.

🔍 Analysis

advanced

Analyze which OSI layer manages session connections

Which OSI layer is responsible for establishing, managing, and terminating communication sessions between applications?

A Transport layer

B Session layer

C Data Link layer

D Network layer

💡 Hint

This layer controls dialogues and connections between computers.

The Session layer manages sessions or connections between applications. It establishes, maintains, and ends communication sessions.

❓ Comparison

expert

Compare the roles of Transport and Data Link layers

Which statement correctly compares the Transport layer and the Data Link layer in the OSI model?

A The Transport layer manages end-to-end communication and error recovery, while the Data Link layer manages node-to-node data transfer and error detection.

B The Transport layer handles physical transmission of bits, while the Data Link layer manages routing between networks.

C The Transport layer encrypts data, while the Data Link layer compresses data.

D The Transport layer establishes sessions, while the Data Link layer manages application interfaces.

💡 Hint

Think about which layer ensures reliable delivery and which handles local network communication.

The Transport layer provides end-to-end communication control and error recovery, ensuring data is delivered reliably. The Data Link layer handles data transfer between adjacent network nodes and detects errors in frames.