根据下面的文字资料回答 32~36 题 FDDI的基本编码方法是(30),在此基础上采用(31) 编码以获得足够多的同步信息,这样使编码效率提高到(32)。为了消除环网中的时钟偏移,FDDl使用了(33)方案,并规定进入站点缓冲器的数据时钟由输入信号的时钟确定,缓冲器的输出时钟信号由(34)确定。第32题:文中(1 )处正确的答案是()。
A.Manchester
B.差分Manchester
C.NRZ
D.NRZ-I
A.Manchester
B.差分Manchester
C.NRZ
D.NRZ-I
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.费用
B.灵活性
C.可靠性
D.环型
A.2
B.3
C.4
D.5
A.远程访问
B.远程网络监控
C.远程登录
D.远程控制
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
第50题:文中(1 )处正确的答案是()。
A.FTTC
B.FTTH
C.FTTB
D.FTTD
A.近端串扰
B.拓扑结构
C.开路或短路
D.错对
A.高
B.不变
C.降低
D.不定