a248.e.akamai.net is the name of a server that belongs to a company called Akamai. Akamai, while unfamiliar to most Internet users, serves between 10 and 20 percent of all web traffic. The company operates a vast network of servers around the world and rents space on these servers to customers who want their websites to work faster. Rather than serving content from their own computers in centralized data centers, Akamai's customers can distribute content from locations close to every user. When a user goes to, say, Whitehouse.gov, their computer is silently redirected to one of Akamai's copies of the Whitehouse website. Often, the user will receive the web page much more quickly than if they had connected directly to the Whitehouse servers. And although Akamai's network delivers more 650 gigabits of data per second around the world, it is almost entirely invisible to the vast majority of its users. Nearly anyone reading this uses Akamai repeatedly throughout the day and never realizes it. Except when Akamai doesn't work.