ns2平台上的脚本测试文件。该代码中，完成了ftp和cbr应用的流量发送，并且最终用xGraph显示发送中的流量图,ns2 platform test scr ipt files. The code, completed applications ftp and cbr traffic sent, and end-users to send in xGraph show the flow chart

Xgra for linux plat form. it plots a graph in x and y dimensions. it is widely used especially with simulator software like ns2.