North Korea’s Internet connection with the world has returned to service after a nine and a half hour outage that followed hours of patchy performance.

The cause of the outage is unknown, although several experts think it was probably due to an external distributed denial of service (DDoS) attack. This involves flooding web servers and other Internet hardware with so much traffic that they become overloaded and cannot respond to legitimate traffic. It’s not an actual hack of the system and so the situation is normalized soon after the DDOS flow of traffic stops.

Dyn Research provided this graph of the attack that shows More >