单项选择题
Which of the following server roles sends out a time signal for clients to synchronize with a clock？（）
A.DHCP B.NTP C.SMTP D.DNS
单项选择题 Which of the following storage interface protocols has the FASTEST speeds?（）
单项选择题 WhichofthefollowingistheBESTwaytoensurethataserverisup-to-datewithallupdatesas soonastheyarereleased？（）
单项选择题 Which of the following is an appropriate reason for adjusting the SNMP thresholds?（）
