Some InfoSecurity

Footprinting

is the organized research of the Internet addresses owned or controlled by a target organization.

Fingerprinting

is a systematic survey of all of the target organization's Internet addresses (which were collected during the footprinting phase); the survey is conducted to ascertain the network services offered by the hosts in that range.

Source:

Whitman, M, & Mattord, H (2005). Principles of information security.Canada: Thomson.