A composite primary key applies to more than one field. <span>A table can have only one primary key, which may consist of single or multiple fields.</span>
A composite primary key is selected from Design view. <span>In Design </span>view<span>, you can use the </span>Primary Key<span> button to assign or remove the </span>primary key<span> designation for the </span>selected<span> field or fields.</span>
Answer:PING
Explanation:The ping command is a command that can be used on the command line interface of your computer to verify that a computer can communicate over the network with another computer. it works by inputing ping command with host name address( IP address)and proceeding with enter button to get output.
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