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Difficulty: EasyNetwork Hardware Devices

A network technician is deploying desktop computers and IP phones in a small office expansion. The devices must all reside on the same local IP subnet, and the IP phones must receive electrical power directly through the network cabling without using individual wall power adapters. Which TWO network hardware components or features should the technician select to fulfill these requirements?

  1. Layer 2 Ethernet switchAnswer
  2. Power over Ethernet (PoE) injectorAnswer
  3. C
    Layer 3 router
  4. D
    DHCP relay agent

Answer

The technician should select a Layer 2 Ethernet switch for local subnet host connectivity and a Power over Ethernet (PoE) injector to supply power over network cabling to the IP phones.
The combination of a Layer 2 Ethernet switch and a Power over Ethernet (PoE) injector directly satisfies both requirements. The Layer 2 switch connects multiple wired endpoints on the same IP subnet, while the PoE injector delivers electrical power across standard Ethernet cabling to power the IP phones without individual power bricks.

Step-by-Step Solution

1
Identify the local network connectivity requirement.
Connecting multiple wired devices on the same local IP subnet requires a Layer 2 Ethernet switch.
Layer 2 switches forward traffic based on MAC addresses within a single broadcast domain/subnet.
2
Identify the power delivery requirement for the IP phones.
Delivering power over Ethernet cabling to IP phones requires Power over Ethernet (PoE) capability, which can be provided via a PoE switch or a PoE injector.
PoE technology combines data transmission and DC electrical power over standard twisted-pair Ethernet cables.

Key Concept

Network Hardware Devices (Layer 2 Switching and PoE Power Delivery)
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Topics

Network Hardware Devices

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