That's not the stuff that typically goes wrong. TCP? DNS? More like persistent cache misses in SQL or some weird edge case caused by an errant vertical tab or

That's not the stuff that typically goes wrong. TCP? DNS? More like persistent cache misses in SQL or some weird edge case caused by an errant vertical tab or a filename getting too long or some limit in array length causing your compiler to do weird stuff. Knowing how any of that list works is more for sysadmins than programmers.