Dynamic Binary Analysis (DBA) is a technique to analyze the behavior of a binary by somehow running it and watch its behavior. Obviously it’s the opposite of Static Binary Analysis in which you disassemble a piece of code and draw the graph of the entire program to see what it does.

If you’re a sysadmin or a backend engineer, you probably have heard of the term “port sharding” or “socket sharding” before. It’s a technique to allow multiple processes to listen on the same TCP or UDP port at the same time. This is done by enabling a special socket option called SO_REUSEPORT on each socket before binding it to an interface.