When a message sent by a user is digitally signed with a private key, the person will not be able to deny sending the message. this application of encryption is an example of:

Awell-diversified portfolio needs about 20-25 stocks from different categories.

The ieee 802.11: defines standards for wireless local area network (wlan) communication protocols. identifies various computers or devices connected to a network. verifies any resource attached to another computer on a network that is different from the computer to which the user is logged on. connects multiple local area networks (lans) and wide area networks (wans).

Think of a spreadsheet as a giant calculator spread of paper chart data collector