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根据下面的文字资料回答 49~53 题ISDN是由(1 )定义的一种网络设备标准。在ISDN的各种设备之间可定义(2 )个参考点,其中把网络终端设备和用户终端设备分开的参考点为(3 )。若一个大的企业要连入ISDN,要用到一个叫NT2的设备,NT2实际上就是(4 )。ISDN网络的构成不包括(5 )。第49题:文中(1 )处正确的答案是()。
A.ISO
B.IEEE
C.CCITF
D.ASCII
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A.ISO
B.IEEE
C.CCITF
D.ASCII
A.控制帧
B.令牌
C.协议帧
D.信息帧
A.间接寻址
B.相对寻址
C.变址寻址
D.立即数寻址
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.近端串扰
B.拓扑结构
C.开路或短路
D.错对
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