CPCT CPCT Structured Cabling Systems & Infrastructure

Question 1

According to ANSI/TIA-568, what is the maximum allowable horizontal cable length from the telecommunications room to the work area outlet?

Accepted Answer

90 meters

Answer

TIA-568 limits the permanent link (horizontal cable) to 90 meters, leaving 10 meters for patch cords and equipment cords to form a 100-meter channel.

Question 2

What is the function of the Main Distribution Frame (MDF) in a structured cabling system?

Accepted Answer

It serves as the central point where outside plant cabling, backbone cabling, and building entrances interconnect

Answer

The MDF (Main Cross-Connect) is the top of the cabling hierarchy where OSP entrance facilities, campus backbone, and building backbone cables terminate and interconnect.

Question 3

How many pairs does a standard T568B-wired RJ45 patch cord use for 10/100BASE-T Ethernet?

Accepted Answer

2 pairs (4 conductors)

Answer

10/100BASE-T Ethernet uses only 2 pairs (pins 1,2 for TX and pins 3,6 for RX) of the 4 available pairs in an RJ45 connector.

Question 4

What does ANSI/TIA-942 govern in the context of structured cabling?

Accepted Answer

Data center telecommunications infrastructure, including cabling, space, and power

Answer

ANSI/TIA-942 defines requirements for data center infrastructure including structured cabling topology, space/layout, power, and cooling for telecommunications facilities.

Question 5

In a structured cabling system, what is the purpose of a horizontal cross-connect (HC)?

Accepted Answer

To interconnect horizontal cabling from the work area with backbone cabling in the telecommunications room

Answer

The horizontal cross-connect in the telecommunications room is where horizontal cables from work area outlets terminate and connect via patch cords to backbone cables or active equipment.

(CPCT) Certified Premises Cabling Technician Practice Test

(CPCT) Certified Premises Cabling Technician Practice Test

CPCT CPCT Structured Cabling Systems & Infrastructure