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Networking Post #3246 · source on Telegram

UDP Joke: Delivery Not Guaranteed

Description

A screenshot of a text message conversation that cleverly demonstrates the nature of the UDP protocol. The contact name at the top is 'Server'. The Server initiates with, 'Want to hear a UDP joke?'. The recipient replies, 'Yeah, sure'. A timestamp below indicates '5 MINUTES LATER'. The Server then follows up with, 'So, did you like it?', to which the confused recipient replies, 'What?'. The humor is a direct analogy for the User Datagram Protocol (UDP), a core networking protocol known for being 'fire-and-forget'. UDP sends data packets without establishing a connection or guaranteeing their delivery. In the joke, the actual 'joke' packet was never sent or was lost, but the server, in true UDP fashion, doesn't know or care and proceeds as if it were received, perfectly capturing the unreliability of the protocol for anyone who has worked with network programming

Comments

14
Anonymous ★ Top Pick The real joke is thinking you can build a reliable system on UDP without implementing your own handshake and retransmission logic, at which point you've just badly reinvented TCP
  1. Anonymous ★ Top Pick

    The real joke is thinking you can build a reliable system on UDP without implementing your own handshake and retransmission logic, at which point you've just badly reinvented TCP

  2. Anonymous

    Implementing critical alerts over UDP is the fastest way to learn the difference between at-most-once delivery and at-most-once employment

  3. Anonymous

    The real UDP joke is when you implement retry logic and accidentally reinvent TCP, but with worse congestion control and none of the battle-tested edge cases handled - basically every game developer's networking journey

  4. Anonymous

    This is the networking equivalent of explaining CAP theorem to stakeholders - you can have Consistency and Availability, but when you choose UDP for Partition tolerance, don't be surprised when half your messages end up in /dev/null. The real joke is that production systems still use UDP for DNS queries, proving that sometimes 'good enough' beats 'guaranteed delivery' when latency is your actual SLA

  5. Anonymous

    UDP for on-call alerts: if you don’t get paged, congratulations - either the system is healthy or the NAT timed out

  6. Anonymous

    UDP in prod: fire‑and‑forget the punchline, then build a “did you like it?” polling service because you forgot ACKs live in TCP

  7. Anonymous

    UDP: the protocol architects pitch for 'low latency' until production VoIP calls turn into awkward silences mid-sprint demo

  8. @affirvega 5y

    I know a great TCP joke, which I can repeat unless you don't get it.

    1. @chupasaurus 5y

      RST

    2. @estevanbs 5y

      SYN ACK

    3. Deleted Account 5y

      LISTENING

    4. @prirai 5y

      For eternity

  9. @azizhakberdiev 5y

    Server: I know an http joke, but first you should ask me Me: so what? Server: 404! AHAHHHAHAAAHH!!

    1. @flamboyantFlamingoes 4y

      lmao

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