Free 5-question sample test with instant feedback. See how ready you are.
Question 1
Which OSI layer is responsible for end-to-end communication, error recovery, and flow control between hosts?
Answer: Layer 4 – the Transport layer. It ensures reliable data delivery using protocols like TCP and manages segmentation, sequencing, and acknowledgment.
Question 2
At which OSI layer does a router primarily operate?
Answer: Layer 3 – the Network layer. Routers use IP addresses to make forwarding decisions between different networks.
Question 3
What is the correct order of the OSI model layers from Layer 1 to Layer 7?
Answer: Physical, Data Link, Network, Transport, Session, Presentation, Application. A common mnemonic is 'Please Do Not Throw Sausage Pizza Away.'
Question 4
Which OSI layer is responsible for data encryption, compression, and format translation?
Answer: Layer 6 – the Presentation layer. It translates data between the application and network formats, handling encryption and compression.
Question 5
What Protocol Data Unit (PDU) is used at the OSI Data Link layer?
Answer: A frame. The Data Link layer encapsulates packets into frames, adding MAC address headers and a trailer for error detection.