communication and network concepts for computer science class 12 handwritten notes with question answer solution pdf download. CBSE class 12 computer science and it and notes for understanding the computer programming and computer hardware and software concepts and also understanding the computer subject of class 12 Central Board of Secondary Education school and state board school which following the NCERT book and in this notes we have also provided you the NCERT and CBSE computer science MCQ Book PDF exercise question answer with solution PDF Download.