Hi, You can check Marc's ns tutorial. There is a ping agent in it. The web is at: http://titan.cs.uni-bonn.de/~greis/ns/ Gang On Tue, 17 Nov 1998, Zhu Ming wrote: > Hi, All, > > Now, are there any send/recv test files like ping-pang communication test > file available in NS2? > > Now, I am in urgent to search it! > Pls help if you know anything about that. > Thank you in advance,