What are the six command groups in powerpoint

Avariable definition defines the name of a variable that will be used in a program, as well as

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).

Why does the pc send out a broadcast arp prior to sending the first ping request