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प्रश्न
What do you mean by a modem? Why is it used?
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उत्तर
Modem stands for ‘Modulator DeModulator’. It refers to a device used for conversion between analog signals and digital signals.
The modem converts digital signals to analog signal (audio frequency) tones which are in the frequency range that the telephone lines can transmit and also it can convert transmitted tones back to digital information.
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संबंधित प्रश्न
Differentiate between packet switching over message switching
Hub is a :
Which of the following is not a network device?
Which of the following device is connected to both the source and destination computer?
A ______ is a software program that is designed to copy itself from one computer to another, without human intervention.
The weakened signal appearing on the cable is regenerated and put back on the cable by a ______.
Set of rules that decide how computers and other devices connect with each other through cables in a Local Area Network is called ______.
Any organization that provides services for accessing internet are called ______.
A switch drops noisy signals and asks sender to resend.
Which of the following is not a network device?
What is true for Modems?
NIC stands for ______.
______ network device is known as an intelligent hub.
A device that is used to connect a number of Lans is ______.
How is tree topology different from bus topology?
Explain the following device:
Switch
Explain the following device:
Repeater
Explain the following device:
Router
Explain the following device:
NIC
Quickdev, an IT based firm, located in Delhi is planning to set up network for its four branches within a city with its Marketing department in Kanpur. As a network professional, give solution to the questions, after going through the branches locations and other details which are given below:
| DELHI BRANCH | |
| BRANCH A | BRANCH B |
| BRANCH C | BRANCH D |
| KANPUR BRANCH |
| MARKETING DEPT. |
Distance between various branches is a follows:
| Branch | Distance |
| Branch A to Branch B | 40 m |
| Branch A to Branch C | 80 m |
| Branch A to Branch D | 65 m |
| Branch B to Branch C | 30 m |
| Branch B to Branch D | 35 m |
| Delhi Branch to Kanpur | 300 km |
Number of computers in each of the branches:
| Branch | Number of Computers |
| Branch A | 15 |
| Branch B | 25 |
| Branch C | 40 |
| Branch D | 115 |
- Suggest the most suitable place to install the server for the Delhi branch with a suitable reason.
- Suggest an ideal layout for connecting all these branches within Delhi.
- Which device will you suggest, that should be placed in each of these branches to efficiently connect all the computers within these branches?
- Delhi firm is planning to connect to its Marketing department in Kanpur which is approximately 300 km away. Which type of network out of LAN, WAN, or MAN will be formed? Justify your answer.
- Suggest a protocol that shall be needed to provide help for transferring of files between Delhi and Kanpur branch.
The modem at the sender’s computer end acts as a ______.
