Dropbox LAN Sync

I was slacking around, when i randomly clicked in Dropbox Cliente Preferences and have seen a interesting propertie (or not):

What is that? LAN sync enables DropBox Clients to sync files from a computer in the local area network, instead syncing them from internet if available (speeding up the process).

Lets analyze whats is happening with a packet monitor:

As we can see it sends UDP broadcast packet about every 30 seconds to detect Local Network Machines.
If it find the files to sync in the local network, Dropbox then use TLS to transfer the files between Local Computers.

Altough is a very cool feature to speed up the syncing process in your home network between friends, or your own computers, in a Campus Wireless Network or public wireless network it is just more overhead being added to the network.

Just make me favor, disable it when you dont need :)