An insightful article about the state of the internet: http://techcrunch.com/2013/08/18/the-internet-were-doing-it-wrong. As the article mentioned (quoting from an article from The Atlantic here), the internet as we know now consist mostly of umbrellas of sites and services operated by a handful of big companies like Google, Apple, Facebook, Amazon, and Microsoft.
The internet was originally conceived to be fault-tolerant of (physical) attacks on communication networks. From Wikipedia (link here):
The origins of the Internet reach back to research commissioned by the United States government in the 1960s to build robust, fault-tolerant communication via computer networks.
While the internet communication continues to be tolerant of physical attacks or failures, the state of the internet now is vulnerable to failures at the company level because services are very concentrated. For example, “Google goes dark for 2 minutes, kills 40% of world’s net traffic.” (Link here.)