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
14Comment deleted
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
Implementing critical alerts over UDP is the fastest way to learn the difference between at-most-once delivery and at-most-once employment
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
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
UDP for on-call alerts: if you don’t get paged, congratulations - either the system is healthy or the NAT timed out
UDP in prod: fire‑and‑forget the punchline, then build a “did you like it?” polling service because you forgot ACKs live in TCP
UDP: the protocol architects pitch for 'low latency' until production VoIP calls turn into awkward silences mid-sprint demo
I know a great TCP joke, which I can repeat unless you don't get it. Comment deleted
RST Comment deleted
SYN ACK Comment deleted
LISTENING Comment deleted
For eternity Comment deleted
Server: I know an http joke, but first you should ask me Me: so what? Server: 404! AHAHHHAHAAAHH!! Comment deleted
lmao Comment deleted