论文部分内容阅读
On 9 September 2016, global Internet data traffic flew past the milestone of 1 ZB, or 1021 bytes—a trillion gigabytes—per year. If you imagine every one of those gigabytes as a brick, a trillion of them would allow you to build 258 Great Walls of China, one ana-lyst estimated [1]. It took nearly 40 years for the Internet to hit that mark. By 2022, annual Internet traffic is expected to reach almost 5 ZB [2].