VDV Copper Cabling 2

Question 1

What is the maximum segment length for Cat5e horizontal cabling under TIA-568 standards?

Accepted Answer

90 meters

Answer

TIA-568 limits horizontal permanent link runs to 90 meters, reserving 10 meters for patch cords to reach the 100-meter channel maximum.

Question 2

Which pair is used for data transmission in a standard 10BASE-T Ethernet connection using T568B wiring?

Accepted Answer

Pairs 1 and 2 (pins 1,2 and 3,6)

Answer

10BASE-T uses pins 1,2 (transmit) and 3,6 (receive), which correspond to pairs 2 and 3 in T568B color coding.

Question 3

What does the term 'NEXT' measure in copper cabling performance testing?

Accepted Answer

Near-End Crosstalk between adjacent pairs at the transmitting end

Answer

NEXT (Near-End Crosstalk) measures the unwanted signal coupling between pairs at the same end where the test signal is injected.

Question 4

A technician is pulling Cat6 cable through conduit and encounters significant resistance. What is the maximum recommended pulling tension for Cat6 UTP cable?

Accepted Answer

110 N (25 lbf)

Answer

TIA-568 specifies a maximum pulling tension of 110 N (25 lbf) for 4-pair UTP cable to prevent stretching or damaging the conductors.

Question 5

Which type of copper cable uses a metallic foil shield around each individual pair as well as an overall braid shield?

Accepted Answer

S/FTP (SFTP)

Answer

S/FTP cable has individually foil-shielded pairs (FTP) plus an overall braided shield (S/), providing maximum EMI protection.

(VDV) Voice Data Video Technician Certified Practice Test

(VDV) Voice Data Video Technician Certified Practice Test

VDV Copper Cabling 2