What are two advantages of Layer 2 Ethernet switches over hubs?（） [" decreasing the number of collision domains"," filtering frames based on MAC addresses"," allowing simultaneous frame transmissions"," increasing the size of broadcast domains"," increasing the maximum length of UTP cabling between device"]
品系若具备优良性状，即可经过鉴定，成为品种，进行推广使用。
Regarding disk scrub， which two of these occur to the data on any local drives upon disassociation？ （） [" If disk scrub is enabled， all BIOS settings for the server are erased."," If disk scrub is enabled， all the data access on any local drives is destroyed."," If disk scrub is enabled， the LSI active RAID is destroyed but data is still preserved."," If disk scrub is disabled， all data on any local drives is preserved， including the local storage configuration."," If disk scrub is enabled， all data on any local drives is preserved， including the local storage configuration."]
技术规范
柴油机的压缩比（） ["11～15","15～22","12～15","22～25"]
通道容量
