<span>An attribute in a relation of a database that serves as the primary key of another relation in the same database is called a</span>
Answer:NULL Scan
Explanation:RFC 793(Request for comments) is a type of RFC command labeled with the number 793 which can operate with the TCP protocol.They are sort of document form which is from IETF( Internet Engineering Task Force ).
The null scan is scanning protocol used by legal as well as illegal hackers for working in the transfer control protocol architecture. It is used for the identification of the the ports and holes in TCP servers.they can also have the negative impact if used by the illegal hackers.
<span>Zenmap's topology tab displays a "Bubble Chart" that shows the relative size and connection type of all discovered IP hosts.
</span>A kind of chart which
shows three dimensional data is known as Bubble chart. It also can be seen as
the variation of scatter plot where bubbles replace the data points.
Answer:
Audimeter
Explanation:
The television index is a measure of audience that estimates the percentage of households or viewers that are watching a television program and with respect to the total that your television is on during the broadcast. It manifests itself in a figure that results from the multiplication of individuals or households, by the time invested. This data is measured with audimeters.