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Hello Networking Gurus of the Internet!

I am trying to figure out the difference between MoCa (Media over Coaxial Alliance) and PDSL (Power Line Digitial Subscriber Line).
I've been using PDSL for many years, however I've recently seen this MoCa thing which appears to do the same thing but instead of using the power lines it uses the existing coaxial television wiring.

Could someone please explain the difference to me, from what I understand the only difference is the cable it uses however judging by the support (Cisco, Verizon, Motorola etc.) it seems I'm missing something here.

Thank you

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  • Latest Post Latest Post by JorgeM

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Good question, — and was right to flag that it is more than just the cable. "MoCA" (coax) and what you call "PDSL" (powerline networking, e.g., HomePlug/PLC) both create an Ethernet-like LAN over an existing in‑home wiring plant, but they use different physical layers, behave differently on reliability/latency, and have different deployment caveats.

MoCA runs over the home coax TV wiring and is designed for high, consistent throughput and low latency; it is commonly used by cable operators for set‑top boxes and whole‑home bridging. Powerline runs over the AC mains and is very convenient (just plug an adapter in), but real performance depends on house wiring, electrical noise, phase boundaries, and outlet filtering. See the tech overviews here: MoCA (coax) and power‑line communication (HomePlug/PLC).

Practical points not obvious from just the media:

  • Real throughput and latency: MoCA tends to be steadier and lower latency than powerline in most homes. Powerline speeds vary a lot with appliances, wiring condition and distance.
  • Isolation and security: both support link encryption, but MoCA signals can leak to the incoming cable network unless you fit a Point‑of‑Entry (PoE) filter; powerline can sometimes cross to other units on the same transformer if not secured.
  • Hardware and splitters: MoCA needs MoCA‑capable splitters and ideally adapters or a modem/router with built‑in MoCA. Powerline needs only outlets — but avoid plugging adapters into surge protectors or power strips.
  • When to pick which: use MoCA if you already have good coax and need reliable, low‑latency links (gaming, multiroom DVR); use powerline where coax is absent or adding cable would be hard.

If testing either, measure real-world throughput and latency, try different rooms, and follow vendor notes (use wall sockets, MoCA PoE filters, correct splitters). Links for deeper reading: and Power-line communication.

Member Avatar for JorgeM

I'm not an expert in this area by any means, but there is definately more to it than just the media. The main difference, i suspect, is probably in the area of the layer-2 transport packets.

In any event, from a subscriber, the most important thing for you is what it costs and what the service level agreement is between you and the provider.

To get you a technical answer about the difference, I'd have to do some reading on my own.

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