Answer:
A primary key is a special relational database table column (or combination of columns) designated to uniquely identify each table record. A primary key is used as a unique identifier to quickly parse data within the table. A table cannot have more than one primary key.
Primary Key.
Candidate Key.
Alternate Key.
Super Key.
Composite Key.
Foreign Key.
Unique Key.
In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation. Informally, a primary key is "which attributes identify a record," and in simple cases constitute a single attribute: a unique ID.
Explanation:
You are using a device that reads the physical addresses contained in incoming data that travels along network cables. Based on the physical address that it reads, the device then forwards the data out one of its ports to reach the destination device. The type of device you are using is router.
<h3>What is Router?</h3>
A router is an hardware device that is used in transferring information or data from a system to another.
The data can also be transfered from one computer networks to another.
Router makes it easier for more than one device to be connected easily without difficult Internet access.
Therefore, The type of device you are using that reads incoming data that travels along network cables is router.
Learn more on router below
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Answer: Answer below.
Explanation:
I'm not fully sure myself, so don't agree with me fully.
I believe what she may have done wrong is tell the technician about a "program." A program doesn't have to do anything with physical hardware.
(IEEE) Is the obvious answer ; no harshness meant in any way