Layer 3 — CompTIA Network+ (N10-009) Practice Questions
Layer 3 refers to the Network layer of the OSI model, which is responsible for logical addressing and routing of packets between networks using protocols such as IP. The Network+ exam tests knowledge of how Layer 3 devices such as routers make forwarding decisions, how IP addressing and subnetting work, and how routing protocols like OSPF and EIGRP exchange topology information. A solid understanding of Layer 3 is required for questions involving inter-network communication, routing troubleshooting, and network design.
Free questions on layer 3
Which security protocol encrypts network traffic at Layer 3?
Free question · medium · full answer + explanation
More layer 3 questions in the full bank
- At which OSI model layer do routers make forwarding decisions? Unlock answer & explanation →
- A site-to-site VPN is established between two data centers with IPSec. What does IPSec provide? Unlock answer & explanation →
- A network host cannot reach remote servers. The administrator confirms DNS works and the default gateway is reachable. What should be checked next? Unlock answer & explanation →