The underlying layers of networking failing- 1. Too many requests for an NIC to handle, 2. Certificates expiring, 3. Firewall changes closing an active port

The underlying layers of networking failing- 1. Too many requests for an NIC to handle, 2. Certificates expiring, 3. Firewall changes closing an active port down, 4. A router failing, 5. Congestion, interference in wireless networks resulting in excessive packet loss. Hardware failing- HDDs, RAM, routers crashing, cables at datacenter being accidentally unplugged, racks being misconfigured during upgrades, maintenance etc. See slide #4 here- http://static.googleusercontent.com/media/research.google.com/en//people/jeff/stanford-295-talk.pdf http://static.googleusercontent.com/media/research.google.co...