CCNA Cisco Networking Certification Sample Test

Try 5 free practice questions with instant feedback. See how ready you are.

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Sample Questions

Question 1

What are the seven layers of the OSI model in order from Layer 1 to Layer 7?

Answer: Physical, Data Link, Network, Transport, Session, Presentation, Application.

Question 2

At which OSI layer does a router primarily operate?

Answer: Layer 3 (Network layer), where it makes forwarding decisions based on IP addresses.

Question 3

At which OSI layer does a standard Layer 2 switch primarily operate?

Answer: Layer 2 (Data Link layer), where it forwards frames based on MAC addresses.

Question 4

What is the PDU (Protocol Data Unit) name at the OSI Transport layer?

Answer: Segment. TCP uses segments to encapsulate data at Layer 4.

Question 5

Which OSI layer is responsible for end-to-end error detection and correction, flow control, and reliable data transfer?

Answer: Layer 4, the Transport layer, handles end-to-end reliability, flow control, and error recovery.