RAS（Registration Admissionand Status）是（）和（）之间交互的信令集合。

A .  NAC can authenticate using 802.1X and IBNS cannot B .  NAC can ensure only compliant machines connect and IBNS cannot C .  NAC can ensure access to the correct network resources and IBNS cannot D .  NAC can manage user mobility and reduce overhead costs and IBNS cannot

A . grants a VoWLAN client-initiated call based on the number of active clients associated to the accesspoint B . grants a VoWLAN client-initiated call based on channel bandwidth capacity C . uses the 802.11i specification D . uses 802.11 action frames E . requires a WMM-enabled client

A . 高可靠性 B . 高安全性 C . 高可用性 D . 高服务性

A . 高可靠性、高持续性、高服务性 B . 高可靠性、高连续性、高服务性 C . 高可靠性、高可用性、高服务性 D . 高可靠性、高扩展性、高服务性

A . 位置更新 B . 签权 C . 寻呼

A . 告诉BSS位臵信息与状态，以便在作为被叫的时候，能够有效寻呼到手机； B . 在时隙模式下，是由手机提供SLOT_CYCLE_INDEX，以便BSC能知道手机在监听哪个时隙； C . 告知BSS手机类别与协议版本以便基站知道手机的能力； D . 进行位臵更新。

A .  port B .  server C .  laptop D .  wireless client

A . when multiple databases are to be registered with the listener B . when DBAs need to connect remotely to start up the database instance C . when users need to connect the database instance using the host naming method D . when the database instance that is to be registered with the listener is configured in shared server mode

A .  CAC is used to allocate enough bandwidth for the number of calls that are allowed on the VoIP network. B .  CAC is used to protect the quality of the voice calls by preventing call establishment if enough resources are not available on the network. C .  CAC provides queuing mechanisms for voice calls if the packets exceed the configured or budgeted rate. D .  In a VoIP network the CAC can be replaced with the LLQ QoS mechanism if it has been properly implemented.

A . 131 B . 00 C . 128 D . 130

A . regions B . partitions C . locations D . device Pool

A . 正确 B . 错误

A．up B．on C．out D．down

是 否

A．A.collective B．B.strengthen C．C.Folding D．D.physical

TINA： Hi, Liu Hui. Guess what came in the__1___ today LIU HUI： Your bill, maybe TINA： No, no. My acceptance__2___ to Yale! LIU HUI： Wow! Congratulations! You've been working so hard for it. When do classes start TINA： Freshman orientation is the last week of __3___, but I want to go two weeks before that to get settled in . LIU HUI： You are great! I guess you will have many things to do before you leave. TINA： Yes, I'll be very busy. I have to get a __4___, buy a plane ticket and pack my things, but first I want to register for classes. LIU HUI： Congratulations again. I believe you will have a___5__ experience at Yale.

A．录取 B．承认 C．坦白 D．许可

A．A.Location Updating B．B.Authentication C．C.Paging