I don't doubt that for critical infrastructure in general, but telecommunication infrastructure in particular seems redundant enough to be resilient against phy

I don't doubt that for critical infrastructure in general, but telecommunication infrastructure in particular seems redundant enough to be resilient against physical layer attacks of that kind. The last mile usually isn't, but recent events have shown that even cutting several cables doesn't have any noticeable impact on international traffic patterns: https://blog.cloudflare.com/resilient-internet-connectivity-baltic-cable-cuts/ https://blog.cloudflare.com/resilient-internet-connectivity-... I'm actually much more concerned about e.g. a logical attack against Cloudflare, which could actually bring down tons of services globally.