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名词解释题
scanning tunnel microscope;STM（扫描隧道显微镜）
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关于扫描隧道显微镜(STM)，下列叙述错误A、STM是IBM苏黎世实验室的Binnig等人在1981年发明的B、为扫描探针显微镜的一种，具有高分辨本领C、仅可在真空条件下工作D、依靠一极细的金属针尖在标本表面扫描来探测标本的形貌E、可直接观察到DNA、RNA和蛋白等生物大分子
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Youwanttodynamicallyassignuserstoan802.1QVLANasaresultoftheirauthentication.Inordertoaccomplishthis.WhichtwoIETFRADIUSattributesshouldyouconfigureontheCiscoSecureACS?()
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以下关于PTN的说法正确的是（）.A、PTN支持的ATM业务处理接口有STM-1、E1、通道化STM-1。B、PTN支持的TDM业务处理接口有E1、通道化STM-1。C、对于以太业务PTN产品在网络侧可以不经PW、tunnel封装，直接封装MAC转发。D、对于所有业务PTN产品在网络侧都必须经PW、tunnel封装才能转发。
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When configuring a multipoint GRE （mGRE） tunnel interface， which one of the following is NOT a valid configuration option：（）A、 tunnel sourceB、 tunnel destinationC、 tunnel keyD、 ip addressE、 tunnelvrf
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You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）A、The crypto ACL numberB、The IPSEC mode （tunnel or transport）C、The GRE tunnel interface IP addressD、The GRE tunnel source interface or IP address， and tunnel destination IP addressE、The MTU size of the GRE tunnel interface
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STM得名“扫描隧道显微镜”的原因是由于它工作时的特点为（）。A、恒电流的工作方式；B、利用针尖获取图象，通过隧道电流进行扫描；C、恒电压的工作方式；D、利用针尖扫描样品表面，通过隧道电流获取图象
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Which of these statements best describes the major difference between an IPv4-compatible tunnel and a 6to4 tunnel？ （）A、 An IPv4-compatible tunnel is a static tunnel， but an 6to4 tunnel is a semiautomatic tunnel.B、 The deployment of a IPv4-compatible tunnel requires a special code on the edge routers， but a 6to4 tunnel does not require any special code.C、 An IPv4-compatible tunnel is typically used only between two IPv6 domains， but a 6to4 tunnel is used to connect to connect two or more IPv6 domains.D、 For an IPv4-compatible tunnel， the ISP assigns only IPv4 addresses for each domain， but for a 6to4 tunnel， the ISP assigns only IPv6 addresses for each domain.
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Which of these is a drawback in using McAfee heuristic scanning？（） A、 heuristic scanning cannot detect new malware with an unknown signatureB、 heuristic scanning requires a separate license keyC、 heuristic scanning increases the probability of false positivesD、 heuristic scanning increases the probability of false negatives
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What is “stream scanning”？（） A、scanning streaming media for malwareB、scanning multiple downloads at the same timeC、passing pieces of a download to the client while the download is being scannedD、passing scanned pieces of the file between two different malware-scanning engines
考题
单选题扫描隧道显微镜（STM）可用来探测样品表面原子尺寸上的形貌。为了有效隔离外界振动对STM的扰动，在圆底盘周边沿其径向对称地安装若干对紫铜薄板，并施加磁场来快速衰减其微小振动。如图所示，无扰动时，按下列四种方案对紫铜薄板施加恒磁场，出现扰动后，对于紫铜薄板上下及左右振动的衰减最有效的方案是（ ）。A
AB
BC
CD
D
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多选题You need to configure a GRE tunnel on a IPSec router. When you are using the SDM to configurea GRE tunnel over IPsec， which two parameters are required when defining the tunnel interfaceinformation？（）AThe crypto ACL numberBThe IPSEC mode （tunnel or transport）CThe GRE tunnel interface IP addressDThe GRE tunnel source interface or IP address， and tunnel destination IP addressEThe MTU size of the GRE tunnel interface
考题
单选题表面形貌分析的手段包括（）A
X射线衍射（XRD）和扫描电镜（SEM）B
SEM和透射电镜（TEM）C
波谱仪（WDS）和X射线光电子谱仪（XPS）D
扫描隧道显微镜（STM）和SEM
考题
单选题Which of these is a drawback in using McAfee heuristic scanning？（）A
heuristic scanning cannot detect new malware with an unknown signatureB
heuristic scanning requires a separate license keyC
heuristic scanning increases the probability of false positivesD
heuristic scanning increases the probability of false negatives
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