paperback. Condition: New. Paperback. Pub Date: 2012. Pages: 488 Language: English Publisher: Tsinghua University Press a nationwide computer technology and software professional and technical qualifications (level) exam reference books: Network Engineer Exam exam-oriented guidance issued by the network to the latest official the engineer examination syllabus and tutorials basis. comprehensive guidance to the candidates. and comprehensively improve the ability of taking the principle of in-depth study of the examinatio.