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The Countries Most Vulnerable To an Internet Shutdown
Sparrowvsrevolution writes "In the wake of Syria's 52-hour digital blackout last week, the networking firm Renesys performed an analysis of which countries are most susceptible to an Internet shutdown, based simply on how many distinct entities control the connections between the country's networks and those of the outside world. It found that for 61 countries and territories, just one or two Internet service providers maintain all external connections–a situation that could make possible a quick cutoff from the world with a well-placed government order or physical attack."
I think this list is concerned with a more specific question. This measure is more useful to which countries could be silenced during a similar uprising, where there is armed opposition. China is unlikely to undergo such an uprising for the same reasons that their ISPs are willing to follow a government's orders. The government enjoys much more popular support with the Chinese than Syria does/did with it's citizens. If there were such a rebellion however, China would stay online longer probably, since presumably some of the entities would join the revolt, would ignore the government's orders, and would not be as easily forcibly shut down because of how many different ones there were. The question wasn't really about general internet censorship, there are other lists and measurements for that.