CTA Broadband & Access Network Technologies

Question 1

What is the maximum downstream speed supported by VDSL2 Profile 17a?

Accepted Answer

100 Mbps

Answer

VDSL2 Profile 17a operates up to 17.664 MHz and supports downstream speeds up to 100 Mbps over short copper loops.

Question 2

What does DOCSIS stand for?

Accepted Answer

Data Over Cable Service Interface Specification

Answer

DOCSIS stands for Data Over Cable Service Interface Specification, the standard governing data transmission over cable TV networks.

Question 3

In DSL technology, what is referred to as the 'last mile'?

Accepted Answer

The connection between the central office and the customer premises

Answer

The 'last mile' refers to the final leg of the telecommunications network connecting the central office (CO) to the end customer's premises, typically over copper wire.

Question 4

Which multiplexing technique separates upstream and downstream signals on an HFC cable network?

Accepted Answer

Frequency Division Multiplexing (FDM)

Answer

HFC networks use Frequency Division Multiplexing to assign separate frequency bands for upstream (5–42 MHz) and downstream (54–1000+ MHz) transmissions.

Question 5

Which DOCSIS version introduced Full Duplex (FDX) operation, enabling symmetric multi-gigabit speeds?

Accepted Answer

DOCSIS 4.0

Answer

DOCSIS 4.0 introduced Full Duplex (FDX) technology, allowing the same spectrum to be used simultaneously for upstream and downstream, enabling symmetric multi-gigabit broadband over coaxial cable.

CTA - Certified Telecommunications Analyst Practice Test

CTA - Certified Telecommunications Analyst Practice Test

CTA Broadband & Access Network Technologies