Troubleshooting the issue similar to (1) was one of my interview questions for a while - though with HTTP. It's a treasure trove of discussion at very different

Troubleshooting the issue similar to (1) was one of my interview questions for a while - though with HTTP. It's a treasure trove of discussion at very different levels. Another "fun" (and hard to debug for the first time) is the problems triggered by duplex mismatch - though the asymmetric ~1/10 difference in performance quickly becomes a signature once you met it once or twice. Also good anchor where you can go into many types of discussions. The very similar to (3) I've seen manifested in IPv6 - due to Neighbor Discovery working over multicast, and potentially asymmetric ways of multicast propagating within the L2 segment (different L2 switches on two sides, etc.) But very interesting to learn this asymmetricity in Solaris stack, thanks!