Question

plz help me in my homework! ​

Answer 1

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$\large\bullet\:\sf\green{Modem}$

• »» A Modem is a hardware device which means Modular-Demodulator

• »» It is a device which is useful in the transfering of data through Telephone lines

• »» We know that a computer can only read a digital signal but only analogue signals can be transmitted in the form of radiations.

• »» So a modulator converts a information from a digital signal to a analogue signal and then back to a digital signal.

$\large\bullet\:\sf\red{Router}$

• »» A Router is a device that is atleast connected to 2 devices.

• »» They are usually located at gateways , that is the place where two or more networks get connected.

• »» They use "headers" and forwarding tables to find out the best path for forwarding the data, and then they use protocols such as the ICMP to communicate with each other.

$\large\bullet\:\sf\orange{Switch}$

• »» It is a connection point from where a data gets transmitted from one device (it may be a computer but not always) to another

• »» It is a much safer way and it recieves the message and knows to which device the data has to be sent

• »» This ensures that our data doesn't get sent to any other device.

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