350-501 Architecture Practice Question
Which access technology uses orthogonal frequency-division multiplexing (OFDM) and is commonly deployed for high-speed internet over copper telephone lines?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DSL
VDSL2 and G.fast use OFDM, but DSL generally refers to xDSL technologies. However, the most common high-speed copper access is VDSL2, but the question is broad. The correct answer is DSL as a family.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
GPON
Why it's wrong here
GPON is fibre.
- ✗
Cable (DOCSIS)
Why it's wrong here
Cable uses coaxial, not telephone lines.
- ✓
DSL
Why this is correct
DSL uses copper telephone lines with OFDM.
- ✗
Metro Ethernet
Why it's wrong here
Metro Ethernet is aggregation.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.