根据下面的文字资料回答 34~38 题DQDB同时支持(1 )两种服务。DQDB子网的双总线结构由(2 )总线以及接在这两条总线上的大量的节点组成。DQDB网络为双总线提供了(3 )访问控制方式,其中能够提供非等时服务是(4 ),它用于(5 )业务。第34题:文中(1 )处正确的答案是()。
A.电路交换和信元交换
B.虚电路交换和分组交换
C.电路交换和分组交换
D.报交电路交换和分组交换
A.电路交换和信元交换
B.虚电路交换和分组交换
C.电路交换和分组交换
D.报交电路交换和分组交换
A.Manchester
B.差分Manchester
C.NRZ
D.NRZ-I
A.费用
B.灵活性
C.可靠性
D.环型
根据下面的文字资料回答 66~70 题
In low-speed network,it is usually adequate to wait for congestion to occur and
then react to it by telling the source of packets to slow down.In high-speed
networks,this approach oftenworks poorly,because in the(1 )between sending the
notification and notification arriving at the source,thousands of
additional(2 )may aITive.In ATM network,a major tool for
preventing(3 )is(4 )control.when a host wants a new virtual(5 ),it must
describe the traffic to be offered and the service expected.
第66题:文中(1 )处正确的答案是()。
A.interval
B.time
C.slot
D.delay
A.远程访问
B.远程网络监控
C.远程登录
D.远程控制
A.2
B.3
C.4
D.5
A.近端串扰
B.拓扑结构
C.开路或短路
D.错对
根据下面的文字资料回答 63~67 题
In low-speed network,it is usually adequate to wait for congestion to occur and
then react to it by telling the source of packets to slow down.In high-speed
networks,this approach oftenworks poorly,because in the(1 )between sending the
notification and notification arriving at the source,thousands of
additional(2 )may aITive.In ATM network,a major tool for
preventing(3 )is(4 )control.when a host wants a new virtual(5 ),it must
describe the traffic to be offered and the service expected.
第63题:文中(1 )处正确的答案是()。
A.interval
B.time
C.slot
D.delay
A.winipcfg
B.ipconfig
C.ipcfg
D.winipconfig
A.高
B.不变
C.降低
D.不定