【答案】:A 30、针对8位二进制数,下列说法中正确的是( )。 A.-127的补码为10000000 B.-127的反码等于0的移码 C.+1的移码等于-127的反码 -1的反码 【答案】:B 31、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.