CompTIA Updated N10-009 Exam Questions and Answers by solomon

A subinterface is a logical interface created on a single physical router interface that allows routing between VLANs (known as Router-on-a-Stick (ROAS)). This method is commonly used when only one physical router is available, allowing inter-VLAN communication without additional hardware.

•Why not the other options?

•VXLAN (B) – This is used for extending Layer 2 networks over a Layer 3 infrastructure, primarily in data centers. It does not directly enable inter-VLAN communication.

•Layer 3 switch (C) – A Layer 3 switch can route between VLANs, but the scenario states that purchasing additional hardware is not an option.

•VIR (D) – This is not a standard networking term in the context of VLAN communication.

The correct answer is Platform as a Service (PaaS). PaaS provides developers with a ready-to-use platform that includes runtime environments, developer tools, middleware, and database services. Developers can focus on writing code while the provider handles security patches, updates, and infrastructure management.

A. CaaS (Containers as a Service) focuses on deploying and managing containerized applications, not providing full developer platforms.

B. IaaS delivers virtual machines, storage, and networking, but administrators must install and maintain the OS, middleware, and updates.

D. SaaS provides end-user applications (e.g., email, CRM), not platforms for development.

By using PaaS, the developers can build applications quickly and cost-effectively without worrying about underlying infrastructure or system maintenance.

References (CompTIA Network+ N10-009):

Domain: Networking Concepts — Cloud service models (IaaS, PaaS, SaaS, CaaS).

•Too much overlap on the same channel (all devices on channel 11) causes interference, leading to retransmissions and high latency.

•Same SSIDs (A) are expected in mesh networks.

•Device compatibility (C) would show different symptoms.

•Node power (D) affects coverage, not congestion.

???? Reference: CompTIA Network+ N10-009 Official Documentation – Wireless Troubleshooting & Signal Interference.

The Network layer (Layer 3 of the OSI model) can utilize the connectionless protocol IP (Internet Protocol) to send data packets independently without establishing a connection. This approach is typical for protocols like IP, which provide best-effort delivery rather than guaranteed delivery. The document explains:

“The OSI Network Layer is responsible for logical addressing and routing, and it can utilize connectionless protocols like IP to send packets without requiring a session setup. This layer does not guarantee packet delivery, relying on higher layers for error detection or correction if needed.”