A primary key is a field that contains data unique to a record
Answer:
Attenuation.
Explanation:
Attenuation means a gradual reduction in the strength of a signal as it moves from station to station which may even cause the receiving station to misinterpret the signal. Any signal can be attenuated - digital or analog.
Attenuation is often caused by weakness, fatigue or passiveness of networking cables and connectors. It could also be caused by noise and long distance.
To get around this, the network device(s) will often resend signals multiple times over just to ensure that at least one of the signals gets there and is interpreted correctly.
Network layer protocols specify the <u>packet structure</u> and processing used to carry data between hosts.
<h3>What is the Network layer protocols about?</h3>
The header, payload, as well as the trailer of a network packet are its three component pieces. The underlying network architecture or protocol employed determines the format and size of a network packet. A network packet resembles a package in concept.
Therefore, Network layer protocols define the packet format and processing needed to transfer data from one host to another host, in contrast to the Transmission layer (OSI Layer 4), which controls the data transport between the programs operating on each end computer.
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