在下列容错结构代号中,属于二次容错结构代号的是()。
A. 1001
B. 1002D
C. 2003
D. 2004
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Which two statements about the use of VLANs to segment a network are true?()
A. VLANs increase the size of collision domains.
B. VLANs allow logical grouping of users by function.
C. VLANs simplify switch administration.
D. VLANs enhance network security.
选购叉车需要看技术参数,下列项目表示叉车性能参数的是()
A. 自重
B. 自由起升高度
C. 轴距
D. 前后轮距