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Difficulty: HardNetwork Hardware Devices

A network technician is assembling a telecommunications rack in a satellite office to support workstation drop cables and voice-over-IP (VoIP) phones. The implementation requires punch-down termination for the permanent horizontal Category 6 cable runs coming from wall outlets, as well as delivering direct DC power over network cabling to the VoIP handsets within the local Layer 2 broadcast domain. Which TWO of the following hardware components should the technician install to fulfill these specific requirements?

  1. Patch panelAnswer
  2. PoE-capable switchAnswer
  3. C
    Layer 3 router
  4. D
    DHCP relay agent

Answer

The technician must install a patch panel and a PoE-capable switch.
The combination of a patch panel and a PoE-capable switch fulfills both requirements. The patch panel receives and terminates the permanent horizontal runs from wall outlets onto punch-down blocks, protecting the cables from wear. Short RJ45 patch cables then connect the patch panel ports to the PoE switch, which forwards Ethernet frames within the local broadcast domain and provides DC power over the network cables to operate the VoIP phones.

Step-by-Step Solution

1
Identify the hardware component required to terminate permanent horizontal cabling runs.
A patch panel is selected because its rear punch-down blocks accept solid-core horizontal Category 6 cabling from wall plates, creating a clean physical cross-connect point.
Directly plugging rigid horizontal cable runs into switch ports causes stress and potential mechanical failure; patch panels bridge structured building wiring to flexible patch cables.
2
Identify the hardware component required to power VoIP handsets over Ethernet cables within the local broadcast domain.
A PoE-capable switch is selected because it supplies power (IEEE 802.3af/at/bt standard) directly over the twisted pairs while handling local Layer 2 packet switching.
PoE switches eliminate the need for separate electrical power adapters at each VoIP phone desk location.

Key Concept

Structured Cabling Termination and Power over Ethernet (PoE) Provisioning
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Network Hardware Devices

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