多项选择题
A.192.168.27.33
B.192.168.27.112
C.192.168.27.119
D.192.168.27.126
E.192.168.27.175
F.192.168.27.208
单项选择题 You are upgrading your Cisco router IOS from a TFTP server over the network. The upgrade procedure is stopped and you are prompted to erase the current flash contents before continuing. What is most plausible reason for this? （）
单项选择题 At Layer 2 of the OSI model, which component connects a host to the network media?（）
单项选择题 Which command is required for connectivity in a Frame Relay network if Inverse ARP is not operational?（）