07年11月网络工程师模拟试题（7）上午试卷

(59) A．故障告警
    B．软件管理
    C．工作负载监视
    D．访问控制
(60) A．MIB-1
    B．MIB-2
    C．MIB-3
    D．MIB-4
(61) A．Information
    B．Exception
    C．Trap
    D．Interrupt
  (62)   A．系统重启动
    B．链路失效
    C．报文认证失败
    D．检索的变量不存在
●RPC使用  (63)  模式。
(63) A．客户机/服务器模式
    B．对等模式
    C．浏览器／服务器模式
    D．都不是
●DNS工作于  (64) 
(64) A．网络层
    B．传输层
    C．会话层
    D．应用层
●在以太网卡中，16位网卡的总线类型一般为  (65)  。
(65) A．ISA
    B．EISA
    C．PCI
    D．PCMCIA
●In the following essay，each blank has four choices．Choose the best answer and write down on the answer sheet．
Spread spectrum simply means that data is sent in   (66)   pieces over a number of the discrete frequencies available for use at any time in the specified range．Devices using  (67)  spread spectrum(DSSS)communicate by splitting each    (68)    of data into several parts and sending them concurrently on different  (69)  ,DSSS uses a lot of the available  (70)  ，about 22 megahertz(MHz)．
(66) A．small
    B．high
    C．low
    D．long
(67) A．direct-sequence
    B．discrete-sequence
    C．duplicate-sequence
    D．dedicate-sequence
(68) A．data
    B．byte
    C．packet
    D．bit
(69) A．bits
    B．frequencies
    C．packets
    D．messages
(70) A．rate
    B．velocity
    C．bandwidth
    D．period
●SDLC was invented by IBM to replace the older Bisynchronous protocol for wide area connections between IBM equipment ．A varietion of the  (71)  protocol called NRM is essentially the same as SDLC．SDLC is  (72)  protocol like HDLC , Frame Relay or X．25．An SDLC network is made up of  (73)  that controls all communications , and  (74)  ．It is capable of  (75)  operation, but almost all practical applications are strictly half duplex．

(71) A．HDLC
    B．Frame Relay
    C．X．25
    D．X．21
(72) A．a peer to peer
    B．a point-to-point 
    C．not a peer to peer
    D．a peer to peers
(73) A．a primary station
    B．one or more primary stations  
    C．a secondary station
    D．one or more secondary stations
(74) A．a primary station
    B．one or more primary stations
    C．a secondary station
    D．one or more secondary stations
(75) A．half duplex
    B．full duplex
    C．half or full duplex
    D．half and full duplex

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