The identification of targets, network surveillance, and active reconnaissance are all terms that you may see in place of each other, in an effort to describe the initial process of assessing an environment. Depending on the framework you are using, such as PTES, a custom company methodology, or some other industry standard, these terms may mean different things. The important thing to remember is that you are looking to see which hosts are live in the approved scope and what services, ports, and features they have open and responsive.
These facets will determine what activities you will perform going from here. All too often, this stage is short-lived, and assessors jump right into exploiting systems that they see responding to scans. Instead of being methodical and researching possible targets, new assessors jump in with both feet. This may have served them well in previous engagements where they got to the goal quickly, but there...