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

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[单选题]A．(71) is a device that enables the computer to handle sounds.A．video cardB．network cardC．sound cardD．card games

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