题目内容
（请给出正确答案）
A.uMesh是无线协议无关的、IP之上、MAC之下的自组织网络协议栈
B.uMesh Routing是一种Mesh，支持树状拓扑和网状拓扑
C.uMesh中的树状拓扑下采用结构化地址路由，极大的减少了路由表大小
D.uMesh可以无缝和TCPP协议栈对接，从而使得各类资源受限的无线设备可以简单的接入IP网络
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