试题(71)~(75)A Bluetooth device can be either a master or a slave and any of the d
试题(71)~(75)
A Bluetooth device can be either a master or a slave and any of the devices within a (71)can be the master. There is only one master and there can be up to (72) active slave devices at a time within a single network. In addition, a device may be a standby slave or a parked slave. There can be up to (73) parked slaves. If there are already maximum number of active slaves, then a parked slave must wait until one of the active slaves switches to (74) mode before it can become active. Within a network, all (75) communications are prohibited.
(71)
A. Wireless LAN
B. Wireless MAN
C. Cellular radio network
D. Piconet
(72)
A. 7
B. 15
C. 63
D. 255
(73)
A. 127
B. 255
C. 511
D. 1023
(74)
A. master
B. standby slave
C. parked slave
D. active slave
(75)
A. master-to-master
B. master-to-slave
C. slave-to-slave
D. slave-to-master
正确答案:D,A,B,C,C参考译文蓝牙设备可以是一个主设备也可以是一个从设备,位于(71)中的任一设备都可以成为主设备。在一个网络中只有一个主设备,最多有 (72)个激活的从设备。另外,一个设备可以是活跃的从设备或是休眠的从设备,最多有(73)个休眠的从设备。如果已有最大数量的活跃从设备,那么,一个休眠的从设备就必须等到某活跃从设备切换到(74)模式后才能被激活。在一个网络内,所有的(75)通信都是被禁止的。参考答案(71)D (72)A (73)B (74)C (75)C
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