Routers, switches, access points and other network devices

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Explain the functions of routers, switches, unmanaged switches, managed switches, wireless access points, modems, patch panels, hubs, firewalls, network interface cards, and broadband or edge devices within a small network.
Differentiate devices that operate primarily at Layer 2 from those that route traffic between networks at Layer 3, at the conceptual level expected by A+ Core 1.

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Describe the role of PoE-capable infrastructure where relevant to wireless access points, IP cameras, VoIP phones, or similar endpoints.

Interpret small-network diagrams to determine how traffic flows between wired hosts, wireless clients, local subnets, and the internet.

Apply device-role knowledge to troubleshooting-style questions involving no link, no routing, no wireless coverage, or no ISP connectivity.

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