– A hub is hardware networking device that connects multiple nodes in a network and send and receive data from all the connected nodes.– A hub contains multiple ports that are used to connect multiple nodes.– A hub is best suitable device for creating small home network (LAN). – A hub transmits data in half […]
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A computer network is a system in which two or more autonomous computers are connected to each other. These computers can share information and other resources. A computer network may also include peripherals such as printers, scanners, webcams, speakers, headphones, microphones etc. you can use these devices to send and receive data and perform tasks,
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Primary Key Foreign Key It identifies the each record in a table uniquely. It maintains the relation between two tables. A foreign key is primary key in another related table. A table can have only one Primary key. A table can have more than one Foreign key. Primary key cannot have NULL values. Foreign key
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