...的路由信息有网络连接的拓扑结构来决定，如节点间通过链接(Link)连接起来，节点根据这些连接信息生成转发表（forwarding tables）。但是在无线网络中没有链接的概念，是通过ad-hoc协议来实现的。
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When there are large Numbers of multicast groups in the network, large forwarding tables induce large memory requirements and slow down the address look-up process.
当大量组播组并存于网络时，数量庞大的转发状态表占用了大量内存资源并且减缓了组播地址查询过程。
A forwarding layer maps ranges of source IDs to physical databases, and replication is handled by building a tree of such tables under the same forwarding address.
该层将一段源id映射到物理数据库，对于同一个物理地址的表，通过建立树来处理。
Where and how Forwarding Information Base (FIB) and Label FIB (LFIB) tables fit in a MPLS VPN environment is one of the key elements to successful troubleshooting.
了解转发信息库(FIB)和标签FIB (LFIB)表如何适应MPLS VPN环境，是成功排除故障的重要基础。
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