【答案】:B 9、关于哈夫曼树,下列说法正确的是( )。 ,权值相同的叶子结点都在同一层上 ,权值较大的叶子结点一般离根结点较远 ,路径上权值较大的结点离根较近 ,当两个字符出现频率相同时,其编码也相同,对于这种情况应作特殊外理 【答案】:C 10、BGP runs over a reliable transport ( ). This eliminates the need to implement explicit update fragmentation, retransmission, acknowledgement, and ( ). Any authentication scheme used by the transport protocol may be used in addition to BGP's own ( )mechanisms. The error notification mechanism used in BGP (请作答此空)that the transport protocol supports a “graceful” close, ., that all outstanding data will be delivered ( )the connection is closed.