To open a file in the update mode, the mode parameter is appended with a plus sign (+).

A digital signature enables you to:

A) create interactive Web content B) displays information about downloads C) add an RSS feed D) verify the publisher of a file

Which of the following networking standards can operate at two different channel widths on the same spectrum simultaneously?

A. 802.11a B. 802.11b C. 802.11g D. 802.11n