3 ms·
It’s funny... I have, sort of. A place I used to work at had a bunch of old serial devices connected to the internet via Ethernet-serial gateways. To query them
by tonyarkles 7y ago
It’s funny... I have, sort of. A place I used to work at had a bunch of old serial devices connected to the internet via Ethernet-serial gateways. To query them, we connected over Telnet (heh). The original devices had a CLI, and the polling was done by sending a series of keystrokes to the devices. Each keystroke was one byte, and was wrapped in an entire TCP packet (~40 bytes, if I recall).
We were blowing through our 1MB (yes...) SIM cards quite quickly, and it was 98% just packet overhead. I can only imagine what it would have been like over http.