说明：  NS2的快速指南---专为不耐烦人士定制。着重解说无线组网方面。
(This document is a quick tutorial on ns-2 [4]. It introduces the basic simulation aspects of wireless networking. Other detailed tutorials and documentation can be found in [4, 2, 3]. We assume the reader is using a Linux machine (on which ns is already installed) and is familiar with common Linux basics.)