A computer network helps in preserving information ,this is possible by_______.

___________ is a network which is establised among a large numbers of computers.

MAN means:-

WAN means:-

_________ is one of the most suited examples of WAN.

_________ device helps a computer to transmit data over telephone or cable lines.

A modem converts__________into analog data.

__________ is used to transmit data at high speed on internet. 

The speed of a modem is measured in ________ per second .

The username and password  is validated by ______.