CBSE Important Questions

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CBSE CLASS XII

Multimedia & Web Technology

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Q. 4. Define Crackers.

ANSWER-Q6.4:
It is a group of the people who can enter into a computer network without an authorized access and can do the malicious activities.

Q. 5. What are the depending factors of Networking Layouts?

ANSWER-Q7.5:
The layout of computer networks depends on the following factors:

  • Repeater is used to boost the speed of the signals and only used if the length of coaxial cable is more than 60m.
  • It is used in each pair of wing or building where the distance if more than 60 m and the cable used is coaxial.
  • Server is placed in the wing/building with the maximum number of Computers.
  • Twisted Paired is the most economic type of cables .
  • Coaxial is suitable in the place where the economic factor is not the concern.
Q. 6. Write a short note on following:
  • SMS
  • Computer Virus
  • Malware
  • Cyber Law
  • Modem
  • Information Kiosk

ANSWER-Q7.6:

SMS :

SMS(Short Message Service) is type messaging service meant for exchanging short text messages. It is the test messaging service component of phone,web or mobile communication systems using standardized communication protocols that allows to exchange short text between fixed lines, web or mobile phone platforms. SMS is compatible in GSM(Global System for Mobile) and CDMA(Code Division Multiple Access) networks.

Computer Virus:

The type of Malware which destroys a targeted program on a computer devices like personal Computer, Laptop, Ultrabook etc. Sometimes, it destroys the whole device itself once it transmits to it from another infected host.
Staog is LINUX Virus and there are many viruses for Windows.

Malware:

The program or scripts which are harmful to the computing devices and can destroy the communication and computing devices are called Malware. Some of the important types of Malware are:-

Worms :

The type of Malware which destroys a targeted program on a computing devices devices like Personal Computer, Laptop, Ultrabook etc .Sometimes it destroys the whole device itself once it replicates on it from another system.

Trojan Horses: 

The type of Malware which destroys a targeted program on a computer devices like Personal Computer, Laptop, Ultrabook etc. It installs itself in the target devices unknowingly.

Spyware: The type of Malware which tracks the different types of activities on a computer devices once it transmits itself from another hostile host. It tracks the different types of activities like user activities, scheduled tasks, operating system health check activities etc .It can be scripts, programs, cookies etc.

AdWare:

The type of Malware which opens a site for an advertisement or installs another program loaded with an advertisement on a computer devices like Personal Computer, Laptop, Ultrabook etc. It may or may transmit itself.

Cyber Law: 

The Information Acts and Rules articulated to regulate and control the illegal practices on Internet or in any 'electronic devices' connected through internet are called Cyber Laws. Indian IT Act was formed in the year of 2000 and some amendments were added in 2008 and 2011. There 23 Indian IT Rules which are also the part of Indian Cyber Laws.

Modem: 

It is a device to connect a computer system like Personal PC, Laptop, Phablets etc. into internet. There are two types of Modem to connect to internet and first one is Wired Modem and another one is Wireless Modem.

 

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Submitted By : Mr. Amrit Chhetri
Computer Science Trainer/Educator, Principal Business Consultant, Social Media Strategist
Mobile : +91-9911290373, +91-9717346736
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