单项选择题
When a host transmits data across a network to another host, which process does the data go through?（）
A. standardization B. conversion C. encapsulation D. synchronization
单项选择题 A network admin wants to know every hop the packets take when he accesses cisco.com. Which command is the most appropriate to use?（）
单项选择题 Which line from the output of the show ip interface command indicates a layer 1 problem?（）
单项选择题 Which statement about IPv6 is true?（）
