Networking Concepts
70 practice questions with explanations — 15 free to try
PassNova has 70 CompTIA Network+ practice questions on Networking Concepts, each with a clear explanation. A 15-question taster is free with no sign-up; the full bank is part of PassNova Premium. Updated for 2026.
Networking Concepts: example questions & answers
3 worked examples with answers and explanations below. Try 15 CompTIA Network+ questions free in the browser; the full 70-question Networking Concepts bank is part of PassNova Premium.
At which OSI layer do routers primarily operate?
- ALayer 2
- BLayer 4
- CLayer 3✓
- DLayer 1
Answer: Routers operate at Layer 3 (Network), making forwarding decisions based on IP addresses.
At which OSI layer do switches primarily operate?
- ALayer 7
- BLayer 3
- CLayer 1
- DLayer 2✓
Answer: Switches operate at Layer 2 (Data Link), forwarding frames based on MAC addresses.
Which OSI layer is responsible for end-to-end connections and reliability via TCP?
- APresentation
- BSession, OSI Layer 5
- CTransport✓
- DNetwork layer, Layer 3
Answer: The Transport layer (Layer 4) handles end-to-end delivery, segmentation, and reliability (TCP/UDP).