This was the source of yesterday’s outage. And in the extensive day-to-day work of maintaining this infrastructure, our engineers often need to take part of the backbone offline for maintenance - perhaps repairing a fiber line, adding more capacity, or updating the software on the router itself. The data traffic between all these computing facilities is managed by routers, which figure out where to send all the incoming and outgoing data. That’s where the information needed by your app gets retrieved and processed, and sent back over the network to your phone. When you open one of our apps and load up your feed or messages, the app’s request for data travels from your device to the nearest facility, which then communicates directly over our backbone network to a larger data center.
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