Severalremotesalesemployees，whohavecomeintotheofficethisweek，reportthattheyare unabletogetontheInternet，butnootherusershavereportedsimilarissues.Thehelp deskhasescalatedtheissueandthecasenotesstatethattheusershaveIPaddressesthatbeginwith169.WhichofthefollowingshouldthesystemadministratorcheckFIRST？（）
A.DHCPserver
B.Networkswitches
C.DNSserver
D.Corerouter
参考答案：A
