Correspondence, Coping With, Dealing With, Support, Software Support
Noun and する verb
たいおう
あの医者の対応は素晴らしかった。
Interacting with that doctor was wonderful.
You respond versus someone else to have an interaction with them. If one of you stops responding, so does the correspondence.
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.