系统反映香港股票市场行情变动的最有代表性的股价指数是恒生指数。
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对于等截面等跨度的连续梁，当跨数大于等于五跨时，可按五跨计算。
A. 正确
B. 错误
个人税务筹划是个人理财规划中的一项重要内容，它是在纳税义务发生之前在法律允许的范围之内，对纳税负担的低位选择。
A. 正确
B. 错误
对所有违法嫌疑人接受调查的，经公安派出所或者县级以上公安机关办案部门负责人批准，使用传唤证传唤。（）
A. 正确
B. 错误
The Company security administrator is concerned with layer 2 network attacks. Which two statements about these attacks are true？ （）
ARP spoofing attacks are attempts to redirect traffic to an attacking host by encapsulating a false 802.1Q header on a frame and causing traffic to be delivered to the wrong VLA
B. ARP spoofing attacks are attempts to redirect traffic to an attacking host by sending an ARP message with a forged identity to a transmitting host.
C. MAC address flooding is an attempt to force a switch to send all information out every port byoverloading the MAC address table.
D. ARP spoofing attacks are attempts to redirect traffic to an attacking host by sending an ARP packet that contains the forged address of the next hop router.
E. MAC address flooding is an attempt to redirect traffic to a single port by associating that port with all MAC addresses in the VLA
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