单项选择题
A. CAT6 B. CAT5 C. Single-mode fiber D. CAT3
Which of the following layers is associated with the ph...
单项选择题Which of the following layers is associated with the physical hardware address of a network node?（）
A.Layer 1 B.Layer 2 C.Layer 6 D.Layer 7
Which of the following OSI model layers is used for log...
单项选择题Which of the following OSI model layers is used for logical addressing?（）
A. Physical B. Transport C. Network D. Data link
Which of the following is the MOST efficient way to tro...
单项选择题Which of the following is the MOST efficient way to troubleshoot network problems?（）
A. Create an action plan B. Implement and test a solution C. Determine if anything has changed D. Identity a probable cause
