单项选择题 A network administrator receives an error message while tring to configure the Ethernet interface of a router with IP address 10.24.24.24/29.which statement explains the reason for this issue?（）

单项选择题 What value is primarily used to determine which port becomes the root port on each nonroot switch in a spanning-tree topology?（）

单项选择题 Assuming default setting,how can you erase the VTP database of VLANs on a CISCO IOS switch running in VTP server mode?（）