IDP in the context of IELTS test stands for:   International Development Program (IDP)   Here is the history of IDP as mentioned in their website:   1969   IDP … established as Australian Asian Universities' Cooperation Scheme (AAUCS) to deliver development assistance to universities in South-East Asia.DS-Intrusion Detection System IDP-Intrusion Detection and Prevention They do similar things-IDS or IDP is one of essential tools for information security officers pro … tect our system.