What is true about Quality of Service (QoS) for VPNs?() ["QoS preclassification is only supported on generic routing encapsulation (GRE) and IPsec VPNs","QoS preclassification is not required in Layer 2 Tunneling Protocol (L2TP), Layer2 Forwarding (L2F), and Point-to-Point Tunneling Protocol (PPTP) VPNs","QoS preclassification is supported on IPsec AH VPNs, but not on IPsec ESP VPNs","the QoS-for-VPNs feature (QoS preclassification) is designed for VPN transport interfaces","with IPsec tunnel mode, the type of service (ToS) byte value is copied automatically from the original IP header to the tunnel header"]
高空旋转的敞开式座舱,如自控飞机、弯月飞车等,均应采用安全带,其带宽不小于()mm ["25","30","40","50"]
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《一千零一夜》又译为?() ["古剑奇谭","天方夜谭","志怪夜谭","京华夜谭"]
某商业银行的资产负债表可简化如下:

当利率敏感性资产和利率敏感性负债的利率都增加2个百分点以后,该银行的利润是多少?