00990nam a2200193Ia 4500 CTU_32751 210402s9999 xx 000 0 und d 004.6 H196 Halsall, Fred Data communications, computer networks and open systems Fred Halsall Harlow, England Addison-Wesley 1997 Drawing on his twenty years as a researcher and teacher, Fred Halsall presents the complex world of data communications and networks with clarity and thoroughness. An invaluable resource to both the student and the practicing computer professional, this fourth edition of the very successful Data Communications, Computer Networks and Open Systems has been extensively updated to reflect the rapid developments in this field. Giao thức mạng máy tính,Computer network protocols Minh, 990817 Trung tâm Học liệu Trường Đại học Cần Thơ