单项选择题
Which of the following is used to create multiple networks from one large network?（）
A.PAT B.NAT C.Multicast D.Subnetting
单项选择题 Which of the following tools allows an administrator to determine the MAC address of another computer?（）
单项选择题 After 100 meters (328 feet), CAT6 cabling is known to experience which of the following symptoms?（）
单项选择题 Kerberos is a form of user authentication that:（）
