RCDD (RCDD): Mastering Telecommunications Standards 2 — Questions and Answers
Question 1: According to ANSI/TIA-568, what is the maximum allowable channel insertion loss for Category 6A cabling at 500 MHz?
- 35.0 dB
- 47.8 dB (Correct answer)
- 20.4 dB
- 55.3 dB
Correct answer: 47.8 dB
ANSI/TIA-568 specifies a maximum channel insertion loss of 47.8 dB for Category 6A at 500 MHz.
Question 2: Which standard defines the requirements for telecommunications pathways and spaces in commercial buildings?
- ANSI/TIA-568
- ANSI/TIA-569 (Correct answer)
- ANSI/TIA-606
- ANSI/TIA-758
Correct answer: ANSI/TIA-569
ANSI/TIA-569 covers telecommunications pathways and spaces, including conduit, cable tray, and room requirements.
Question 3: What does the BICSI TDMM define as the maximum recommended distance for a horizontal cable run in a standard structured cabling design?
- 50 meters
- 70 meters
- 90 meters (Correct answer)
- 100 meters
Correct answer: 90 meters
The permanent link maximum is 90 meters for horizontal cabling, with 10 meters reserved for patch cords and equipment cables to stay within the 100 m channel limit.
Question 4: In the context of TIA-568, what parameter measures the unwanted signal coupling from one pair to another at the far end of a cable?
- NEXT
- ELFEXT (Correct answer)
- Return Loss
- Insertion Loss
Correct answer: ELFEXT
ELFEXT (Equal Level Far-End Crosstalk) measures pair-to-pair crosstalk at the far end of a cable, normalized for insertion loss.
Question 5: Which ISO/IEC standard is the international equivalent to ANSI/TIA-568 for generic cabling for customer premises?
- ISO/IEC 11801 (Correct answer)
- ISO/IEC 14763
- ISO/IEC 18010
- ISO/IEC 24702
Correct answer: ISO/IEC 11801
ISO/IEC 11801 is the international standard for generic cabling for customer premises, paralleling ANSI/TIA-568.
Question 6: What is the minimum bend radius for a 4-pair UTP cable during installation according to TIA-568?
- 1x cable diameter
- 4x cable diameter
- 8x cable diameter (Correct answer)
- 10x cable diameter
Correct answer: 8x cable diameter
TIA-568 requires a minimum bend radius of 8 times the cable diameter for 4-pair UTP cable during and after installation.
Question 7: A TIA-568 Class E channel corresponds to which Category of balanced twisted-pair cabling?
- Category 5e
- Category 6 (Correct answer)
- Category 6A
- Category 7
Correct answer: Category 6
ISO/IEC Class E and TIA Category 6 are equivalent designations for cabling supporting up to 250 MHz.
RCDD (RCDD): Mastering Telecommunications Standards 2
According to ANSI/TIA-568, what is the maximum allowable channel insertion loss for Category 6A cabling at 500 MHz?