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CompTIA Network+ · Exam domain
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1. Which network device operates at Layer 2 of the OSI model and forwards traffic based on MAC addresses?
Explanation
A switch operates at Layer 2 (Data Link) of the OSI model, using MAC addresses to forward traffic. A is incorrect because routers operate at Layer 3 (Network) and use IP addresses. B is incorrect because hubs operate at Layer 1 (Physical) and simply repeat signals. D is incorrect because firewalls can operate at multiple layers but primarily filter traffic based on rules, not just MAC addresses.
2. Which of the following devices is BEST suited for distributing network traffic across multiple servers to improve performance and availability?
Explanation
A load balancer distributes network traffic across multiple servers, ensuring no single server is overwhelmed. A is incorrect because a VPN concentrator manages secure connections. C is incorrect because a proxy server acts as an intermediary for requests. D is incorrect because an IDS/IPS detects and prevents intrusions.
3. Which security device is designed to actively block malicious traffic based on predefined rules and signatures?
Explanation
An Intrusion Prevention System (IPS) actively blocks malicious traffic. A is incorrect because a firewall primarily controls network access based on rules. B is incorrect because an Intrusion Detection System (IDS) only detects and alerts but does not block. D is incorrect because a VPN concentrator secures remote connections but doesn't primarily focus on intrusion prevention.
4. Which routing protocol is best suited for a small network with limited hops and requires minimal configuration?
Explanation
RIP (Routing Information Protocol) is well-suited for small networks due to its simplicity and ease of configuration. A is incorrect because OSPF is better suited for larger networks due to its complexity. B is incorrect because EIGRP, while easier to configure than OSPF, is more complex than RIP. D is incorrect because BGP is used for routing between autonomous systems, not typically within a small network.
5. Which bandwidth management technique prioritizes different types of network traffic based on predefined criteria?
Explanation
Quality of Service (QoS) mechanisms prioritize different types of network traffic, ensuring that critical applications receive preferential treatment. A is incorrect because traffic shaping controls the rate of traffic. B is incorrect because load balancing distributes traffic across multiple servers. D is incorrect because port forwarding redirects traffic from one port to another.
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