RCDD (RCDD): Mastering Telecommunications Standards 5 — Questions and Answers
Question 1: What ANSI/TIA standard specifies grounding and bonding requirements for telecommunications in commercial buildings?
- ANSI/TIA-568
- ANSI/TIA-569
- ANSI/TIA-606
- ANSI/TIA-607 (Correct answer)
Correct answer: ANSI/TIA-607
ANSI/TIA-607 specifies the grounding and bonding requirements for telecommunications infrastructure in commercial buildings.
Question 2: According to TIA-942, which area of a data center houses the main distribution frames and core network equipment?
- Zone Distribution Area (ZDA)
- Horizontal Distribution Area (HDA)
- Main Distribution Area (MDA) (Correct answer)
- Equipment Distribution Area (EDA)
Correct answer: Main Distribution Area (MDA)
The Main Distribution Area (MDA) in TIA-942 houses the core network equipment and main cross-connects for the data center.
Question 3: In ANSI/TIA-568, what is the Permanent Link test configuration used to verify?
- The complete channel including all patch cords
- The fixed installed cabling from outlet to patch panel excluding patch cords (Correct answer)
- Only the horizontal cable without connectors
- The backbone cabling between telecommunications rooms
Correct answer: The fixed installed cabling from outlet to patch panel excluding patch cords
The Permanent Link tests the fixed installed cabling from the work area outlet to the patch panel, excluding equipment and patch cords.
Question 4: Which parameter, defined in TIA-568, measures the sum of power from all disturbing pairs affecting a single pair at the near end?
- NEXT
- PSNEXT (Correct answer)
- FEXT
- PSELFEXT
Correct answer: PSNEXT
PSNEXT (Power Sum Near-End Crosstalk) measures the combined crosstalk coupling from all disturbing pairs onto a single pair at the near end.
Question 5: What is the minimum clearance specified by ANSI/TIA-569 between communications cable trays and fluorescent lighting fixtures to avoid electromagnetic interference?
- 30 mm (1.2 in)
- 75 mm (3 in)
- 130 mm (5 in) (Correct answer)
- 300 mm (12 in)
Correct answer: 130 mm (5 in)
ANSI/TIA-569 requires a minimum 130 mm (5 in) separation between telecommunications cable trays and fluorescent lighting fixtures to minimize EMI.
Question 6: Under TIA-568, what category of balanced twisted-pair cable is required to support 40GBASE-T at 30 meters?
- Category 6
- Category 6A
- Category 7
- Category 8 (Correct answer)
Correct answer: Category 8
Category 8 (Class I or II per ISO) is required to support 40GBASE-T, operating at frequencies up to 2000 MHz at distances up to 30 meters.
Question 7: According to ANSI/TIA-568, what is the maximum optical loss allowed for a single field-installed fiber optic connector?
- 0.1 dB
- 0.3 dB (Correct answer)
- 0.5 dB
- 0.75 dB
Correct answer: 0.3 dB
ANSI/TIA-568 specifies a maximum insertion loss of 0.3 dB for a single field-installed fiber optic connector.
RCDD (RCDD): Mastering Telecommunications Standards 5
What ANSI/TIA standard specifies grounding and bonding requirements for telecommunications in commercial buildings?