The thing to remember is that just because dev has decided to leverage microservices does not in turn mean that the network somehow magically becomes microsegmented or that if microsegmentation is used to optimize the network service architecture that suddenly apps become microservices. Microsegmentation can be used to logically isolate monolithic applications as easily as it can microservices.
“Micro is big these days” - The below statement is from an article showing the similarities and differences between microservices and microsegmentation. Of course we all know the differences, but we might have never thought about the similarities between the two approaches.