Wireshark does not display the preamble field of a frame header. what does the preamble contain?

Before you enter an intersection on a green light make sure

Under which key category do the page up and page down keys fall? page up and page down keys fall under the keys category.

Other - a written response, no less than arial 12-point font, to the following: of the following, which would you consider is most important to customer service goals? choose one and explain why. (1) accuracy (2) punctuality and attendance (3) courtesy (4) productivity (5) organization