What is the Link-Layer Topology Discovery Mapper (lltdsvc) service?

An explanation of the Link-Layer Topology Discovery Mapper (lltdsvc) service in Windows 7.

What does the Link-Layer Topology Discovery Mapper (lltdsvc) service do?

The Link-Layer Topology Discovery Mapper (lltdsvc) is responsible for creating those nice network maps when you’re browsing a network.

Link-Layer Topology Discovery Mapper (lltdsvc) service details

  • Service name: lltdsvc
  • Description: Creates a Network Map, consisting of PC and device topology (connectivity) information, and metadata describing each PC and device. If this service is disabled, the Network Map will not function properly.
  • Path to executable: C:\windows\system32\svchost.exe -k NetworkServiceNetworkRestricted
  • Startup type: Manual

Does my computer need the Link-Layer Topology Discovery Mapper (lltdsvc) service?

Your computer doesn’t need the lltdsvc service to run.

Should I disable the Link-Layer Topology Discovery Mapper (lltdsvc) service?

First off, I have to say that it’s best to leave service optimization up to Microsoft. With that said; I would leave the lltdsvc service alone.

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