单项选择题
A. Mesh B. Point to point C. Point to multipoint D. Ring
An administrator attempts to open a web page and sees t...
An administrator attempts to open a web page and sees the following error: 'Error 404: Page not found'. The administrator then uses the ping command and finds that the default gateway cannot be pinged. At which of the following layers does the problem MOST likely reside?（）
A.Layer 1 B.Layer 4 C.Layer 5 D.Layer 7
The technician notices that one of the wires in a CAT5 ...
单项选择题The technician notices that one of the wires in a CAT5 cable is cut in half. Which of the followingconnectivity issues did the technician discover?（）
A.Open pairs B.Attenuation C.Crosstalk D.Interference
Which of the following cable types is intended to be us...
单项选择题Which of the following cable types is intended to be used on short distances and is immune to anytype of interference?（）
A. Singlemode fiber B. Multimode fiber C. Shielded twisted pair D. Unshielded twisted pair
