Security

When the Internet goes down

"A third of the Internet is under attack. Millions of network addresses were subjected to distributed denial-of-service (DDoS) attacks over two-year period," reports Warren Froelich on the UC San Diego News Center website. ...

Traffic congestion

Traffic congestion is a condition on networks that occurs as use increases, and is characterized by slower speeds, longer trip times, and increased queueing. The most common example is the physical use of roads by vehicles. When traffic demand is great enough that the interaction between vehicles slows the speed of the traffic stream, congestion is incurred. As demand approaches the capacity of a road (or of the intersections along the road), extreme traffic congestion sets in. When vehicles are fully stopped for periods of time, this is colloquially known as a traffic jam.

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