When a primary device wants to send data to a secondary device, it needs to first send _______ frame. January 11, 2022January 11, 2022 administrator A. ACKB. PollC. SELD. ENQCheck AnswerD. ENQ Share the PostRelated Posts:Which device among the following is used to send…_______ control refers to a set of procedures used…Which of the following is the primary output device…In Go-Back-N ARQ, if frames 4, 5, and 6 are received…It is a secondary plant nutrient??A nuclear reactor is a device used to carry out…