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