 Although it was originally named "dumb scan", the term "idle scan" was coined in 1999, after the publication of a proof of concept 16-bit identification field (IPID) scanner named "idlescan", by Filipe Almeida (aka LiquidK).This type of scan can also be referenced as "zombie scan"; all the nomenclatures are due to the nature of one of the computers involved in the attack.The design and operation of the Internet is based on the Internet Protocol Suite, commonly also called TCP/IP.