单项选择题 A SAN needs to undergo disruptive maintenance， which will effect a hosted production system with multiple applications and related volume groups， one of which， datavg， resides on the SAN. There is one spare disk in the system but it is smaller than datavg. How can application outages and risk of corruption be minimized？（）

单项选择题 Whichcommandshouldbeusedtocapturenetworktrafficbetweenthelocalhostandahostnamed‘webserver’？（）

单项选择题 Whatshouldanadministratordotoallowthelogonofausertoalocalsystemwithoutlimitationsfromthehost‘webserver’？（）