over the years i think the internet has proved to be a bit flaky BGP

en.wikipedia.org/wiki/Border_Gateway_Protocol

has proved to be non trivial and mistakes have been made both accidentally and maliciously that have broken large chunks of the internet

having said that i think that things like P2P protocols - Kademlia, Gnutella, UDP bittorent, TOR etc have proved to be very resilient and hard or impossible to break despite concerted efforts to do so. these protocols have adapted to hide using VPN, HTTP and other tunneling techniques and services have distributed themselves effectively such that they have never been eradicated