Street construction backbone cuts happen all of the time. I work for the biggest carrier network in the world, we saw impact from this, but a single L3 DNS node is not the end of the world. We live and work in a redundant world of redundancy world.
Intentional? Possibly...that happens all of the time as well. We usually see 5-10 cases a year that we can pin and prove on sabotage.
Years like this year where the CWA strike, and then leave the picket line to drive home in their Mercedes, it can climb 10 fold..people are dumb.
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