根据下面的文字资料回答 57~58 题 虚拟存储管理系统的基础是程序的(1 )一理论,这个理论的基本含义是指程序执行时往往会不均匀地访问主存储器单元。根据这个理论,Denning提出了工作集理论。工作集是进程运行时被频繁地访问的页面集合。在进程运行时,如果它的工作集页面都在(2 )内,能够使该进程有效地运行,否则会出现频繁的页面调入/调出现象。第57题:文中(1 )处正确的答案是()。
A.全局性
B.局部性
C.时间全局性
D.空间全局性
A.全局性
B.局部性
C.时间全局性
D.空间全局性
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.2
B.3
C.4
D.5
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 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.远程访问
B.远程网络监控
C.远程登录
D.远程控制
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