Data Communications and Networking Forouzan Fourth Edition Chapter 6 带宽利用 (Bandwidth Utilization: Multiplexing and Spreading) 6.1 CopyrightThe McGraw-Hill Companies,Inc.Permission required for reproduction or display6.1 Chapter 6 带宽利用 (Bandwidth Utilization: Multiplexing and Spreading) Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display