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Structured Cabling & Connectivity Flashcards

7 cards from real ATP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which type of fiber optic cable is designed for long-distance backbone runs exceeding 2 km and uses a 9/125 µm core/cladding specification?

    Answer: Single-mode (OS2)

    OS2 single-mode fiber with a 9/125 µm specification supports transmission distances well beyond 2 km and is used for campus and long-haul backbone applications.

  2. In TIA-568 structured cabling, what does 'ELFEXT' measure?

    Answer: Equal Level Far-End CrossTalk, measuring far-end crosstalk relative to insertion loss

    ELFEXT (Equal Level Far-End CrossTalk) measures far-end crosstalk normalized against insertion loss, providing a true signal-to-interference ratio at the far end.

  3. A technician is terminating a 110-style punch-down block. Which tool is required for proper termination?

    Answer: 110 punch-down tool with 110 blade

    A 110 punch-down tool with the correct 110-style blade is required; using a 66-blade or Krone blade will result in improper termination and potential damage to the IDC connector.

  4. What is the maximum pulling tension allowed for a 4-pair Cat 6 UTP cable during installation?

    Answer: 25 lbf (110 N)

    TIA-568 limits maximum pulling tension to 25 lbf (110 N) for 4-pair UTP cable to prevent stretching the conductors and degrading electrical performance.

  5. Which structured cabling standard defines the specifications for telecommunications pathways and spaces (cable trays, conduits, equipment rooms)?

    Answer: TIA-569

    TIA-569 (Commercial Building Standard for Telecommunications Pathways and Spaces) governs the physical spaces and pathways through which cabling is routed.

  6. What is the maximum recommended fill ratio for a cable tray carrying only UTP horizontal cables?

    Answer: 50%

    TIA-569 recommends a maximum 50% fill ratio for cable trays carrying UTP cables to allow for heat dissipation and future cable additions.

  7. A structured cabling installer needs to support 10GBASE-T at 100 meters. Which minimum cable category is required?

    Answer: Cat 6A

    Cat 6A (Augmented Category 6) is the minimum category specified in IEEE 802.3an to support 10GBASE-T at the full 100-meter channel distance.