The 2nd row of ur keyboard its called home row !
This is called a key attribute!
There are different types of key attributes!
Primary key is the key that is actually chosen, for example a social security number.
There is also a unique key, say our finger prints! they also uniquely identify humans, but usually we prefer to use social security number when we list people (a unique key could be a primary key if we chose so)
We could also identify people by their social security number and a name, but this is unnecessary, as social security number already gives a full identification. Such a reduntant key is called super key.
Answer:
<h3>Connector names are written below Picture vise:</h3>
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Explanation:
Following is the brie Illustration of the terms used:
It is the newest connector in the market with the reversible/symmetrical design. It can be adapted to work with the legacy connectors such as USB-A, USB-B, USB-C and Micro USB.
It is used mostly in the connections of electronic devices such as printers and smartphones. It has A to B connectors as well as micro USB connectors and mini USB connectors.
It is used for the connection o compact devices such as smartphone and mp3 players. They are further grouped into three categories: Micro A, Micro B and micro USB 3.
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I hope it will help you!</h3>
Answer:
Blocking Mode
Explanation:
Spanning Tree Protocol is used to allow path redundancy in the network without creating cycles/circles also called loops.
When two parts of the switched network are connected via two or more Layer 2 switches this result in a loop.
This affects the performance of the network as the result of broadcast packets flooding.
STP puts one port of the switch to forwarding mode and the rest of the ports within the same part of the network to the blocking mode to avoid broadcast packet flooding. STP puts all the ports that are allowing redundant paths to blocking mode and the one port that is left after this is placed in forward mode.
Spanning Tree Algorithm is used by STP to determine the optimal path of switch to the network.
Bridge Protocol Data Units are used to share the information about the optimal path determined by the spanning tree algorithm with other switches.
This information helps STP to eliminate the redundant paths.
So this is how STP allows only one active path to the destination while blocking all other paths to avoid switching loop.
