【单选题】
某工业用户一级重要电力客户，根据《国家电网公司业扩供电方案编制导则》规定，其供电电源【】采用双电源供电，并配置自备应急电源。___
A. 宜
B. 可
C. 应
D. 不应
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答案
C
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集中器、采集终端等装置安装高度应适当，在电表房或电缆竖井内，如受位置局限，可适当降低安装高度，但底部离地面不得小于【】米。___
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10kV及以下电力接户线固定端当采用绑扎固定时，其绑扎长度应满足：当导线为25～50mm2时，应绑扎长度【】。___
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【单选题】
两台单相电压互感器按V/V形连接，二次侧v相接地。若电压互感器额定变比为10000V/100V，一次侧接入线电压为10000V的三相对称电压。带电检查二次回路电压时，电压表一端接地，另一端接U相，此时电压表的指示值为【】V左右。___
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在电价低的供电线路上，擅自接用电价高的用电设备或私自改变用电类别的，应按实际使用日期补交其差额电费，并承担【】倍差额电费的违约使用电费。___
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【多选题】
In which form of fraud does an attacker try to learn information such as login credenti account information by ma squerading as a reputable entity or person in email， IM or communication channels ?___
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Which security principle has been violated if data is altered in an unauthorized manner？___
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Which IKE Phase 1 parameter can you use to require the site-to-site VPN to use a pre-shared ？___
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Which command successfully creates an administrative user with a password of "cisco"on a Cisco router?___
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Refer to the exhibit. what is the e ffect of the given configuration？___
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Which command can you enter to configure OSPF to use hashing to authenticate routing updates？___
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C.
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which attack involves large numbers of ICMP packets with a spoofed source IP address？___
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Which security term refers to the like lihood that a weakness will be exploited to cause damage to an asset？___
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【单选题】
In which type of attack does an attacker overwrite an entry in the CAM table to divert traffic destined to a legitimate host？___
A. DHCP spoofing
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