The primary use of dextromethorphan is as a cough suppressant, for the temporary relief of cough caused by minor throat and bronchial irritation (such as commonly accompanies the flu and common cold), as well as those resulting from inhaled particle irritants.
As of Q4 2016, South Korea had the fastest average internet connection in the world at 26.1 Mbit/s according to the report State of the Internet published by Akamai Technologies. South Korea's speed is almost four times faster than the world average of 7.0 Mbit/s.
What constitutes fast connection speed depends on where you are. Web Analytics World reports the fastest average Internet speed in the world, as of January 2010, is South Korea's 14.6 megabits per second. Internet service providers' minimum speeds hover around 1Mbps, so anything over 10Mbps is considered fast.