Windows 7 Service Details
Your wired networking will still continue to work, so I do not actually know what this is useful for. Probably for viewing them in Networking tool.
The Wired AutoConfig (DOT3SVC) service is responsible for performing IEEE 802.1X authentication on Ethernet interfaces. If your current wired network deployment enforces 802.1X authentication, the DOT3SVC service should be configured to run for establishing Layer 2 connectivity and/or providing access to network resources. Wired networks that do not enforce 802.1X authentication are unaffected by the DOT3SVC service.
Consequences of Stopping:
All services listed in 'Required For' will be unable to function