详细介绍无线多跳adhoc网络的PPT.包括网络中的MAC层和路由层介绍、常用的协议算法，存在的问题，TCP与UDP协议性能比较，安全问题等，有助于了解Ad hoc网络的概况 -Details of the wireless multi-hop adhoc networks PPT. Including the network MAC layer and routing layer descr iption of the protocol algorithm used, problems,

The use of Internet Protocol Suite of TCP/UDP in environments characterized by high delay and high Link Error rates result in significant degradation of the Protocol Performance. The DTN Bundle Protocol can be used in such scenarios.

sim800 at commands for tcp/udp single/mutli connection