16 Matching Annotations
  1. Last 7 days
    1. Once frozen, TIME_WAIT connections never expire, ephemeral ports slowly exhaust, and eventually no new TCP connections can be established at all. ICMP (ping) keeps working. Everything else dies.

      大多数人认为操作系统崩溃才会导致网络完全失效,但作者认为macOS可以在看似完全正常的情况下陷入网络瘫痪状态,因为只有TCP协议栈失效而ICMP仍能工作。这种'部分系统死亡'的状态非常反直觉,因为系统不会崩溃或报错,只是TCP连接停止工作。

  2. Oct 2025
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  9. Sep 2020
    1. It's fashionable to dislike CSS. There are lots of reasons why that's the case, but it boils down to this: CSS is unpredictable. If you've never had the experience of tweaking a style rule and accidentally breaking some layout that you thought was completely unrelated — usually when you're trying to ship — then you're either new at this or you're a much better programmer than the rest of us.
  10. Jul 2020
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  12. May 2020