根据下面的文字资料回答 51~55 题 ATM网络的协议数据单元称为(1 )。ATM适配层分为(2 )两个子层。(3 )是对应于A类业务的ATM适配层,它提供的业务特点是(4 )。如果要传送IP数据报,则需要(5 )业务的支持。第51题:文中(1 )处正确的答案是()。
A.信元
B.帧
C.分组
D.报文
A.信元
B.帧
C.分组
D.报文
第50题:文中(1 )处正确的答案是()。
A.FTTC
B.FTTH
C.FTTB
D.FTTD
A.间接寻址
B.相对寻址
C.变址寻址
D.立即数寻址
A.处于直通状态
B.属于同一VLAN
C.属于不同VLAN
D.地址都相同
A.加入时间戳
B.加密
C.认证
D.使用密钥
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