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.
Well as far as records go, the fastest ever Internet download speed was 1.4TB/s. This quote gives some insight into just how massive this is, BT and Alcatel-Lucent have achieved the fastest ever broadband speed of 1.4 terabits per second during a field test in London, which is the equivalent to 44 HD films being downloaded in a single second..