5357 Port !free!

Modern networking relies on devices finding each other automatically. In the past, you manually entered IP addresses. Today, protocols like WSD (Web Services on Devices) make it "plug and play."

It doesn’t have the instant recognition of Port 80 (web) or Port 443 (HTTPS). So what is it? Is it a backdoor? A virus? Or just part of your operating system doing its job? 5357 port