单项选择题
A technician would use a physical network diagram to determine:（）
A. the cause of routing errors. B. the number of switches on the network. C. the number of users on the network. D. where network latency will occur.
单项选择题 Which of the following uses PKI?（）
多项选择题 10GBase-T is backward compatible with which of the following? (Select TWO).（）
单项选择题 A technician is looking for an emergency connection solution not reliant on local data or power services. Which of the following should the technician implement?（）
