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Difficulty: MediumNetwork Hardware Devices

A network technician is expanding an office network infrastructure. The design specifications require creating two separate IP subnets for voice and data traffic, routing communications between these subnets, and providing inline power to newly installed IP desk phones over standard Cat 6 Ethernet cabling. Which TWO of the following hardware deployments will satisfy all requirements? (Select TWO.)

  1. Deploying a Layer 3 switch equipped with Power over Ethernet (PoE) portsAnswer
  2. Deploying a Layer 2 PoE-capable switch connected to a dedicated Layer 3 routerAnswer
  3. C
    Deploying an unmanaged Layer 2 switch using APIPA addresses to route traffic across subnets
  4. D
    Deploying a Layer 2 switch and configuring a centralized DHCP server to perform inter-subnet routing

Answer

Deploying a Layer 3 switch equipped with Power over Ethernet (PoE) ports, and deploying a Layer 2 PoE-capable switch connected to a dedicated Layer 3 router.
Routing traffic between subnets requires a Layer 3 device (such as a Layer 3 switch or a dedicated router), while supplying power to IP desk phones over Cat 6 cabling requires PoE capability. Deploying a Layer 3 PoE switch combines both functions in one device, whereas using a Layer 2 PoE switch connected to a Layer 3 router splits the power delivery and routing functions between two suitable devices.

Step-by-Step Solution

1
Analyze the inline power requirement for IP desk phones.
Hardware must support Power over Ethernet (PoE) to pass electrical power alongside data on Cat 6 cables.
PoE eliminates the need for separate AC power bricks at user workstations.
2
Analyze the network layer requirement for isolating and connecting separate IP subnets.
The infrastructure requires Layer 3 routing functionality.
Layer 2 devices only forward Ethernet frames within a single broadcast domain/subnet. Crossing IP subnet boundaries requires Layer 3 packet routing.
3
Evaluate hardware deployment options against both criteria.
Both a single Layer 3 PoE switch and a Layer 2 PoE switch paired with a Layer 3 router satisfy all criteria.
Both options integrate PoE power delivery with Layer 3 IP routing capacity.

Key Concept

Layer 2 vs Layer 3 network hardware capabilities and Power over Ethernet (PoE) integration
Estimated Time:1m 30s
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Topics

Network Hardware Devices

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