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Mobile Telecommunication Technologies, Network Security and Internet Services

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Question
CBSEENCO12011556
Wired Faculty App

Differentiate between Radio Link and Microwave in context of wireless communication technologies.

Solution

Radio Link: Data is transmitted outward from the antenna through free space in all directions. It is a Slow means of communication.

Microwave: Data is transmitted based on a line of sight principle, faster than radio communication.

Specifications

Radio 

Microwave

Frequency range(Hz)

3 x 105 to 3 x 1011

3 x 108 to 3 x 1011

Wavelength

103 to 10-3 meters

1 to 10-3 meters

Applications

Mobile,AM/FM radio, television

radar, satellite and space communication

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Question
CBSEENCO12011557
Wired Faculty App

Amit used a pen drive to copy files from his friend’s laptop to his office computer. Soon his office computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop functioning totally. Which of the following options out of (i) to (iv), would have caused the malfunctioning of the computer. Justify the reason for your chosen option:

  • Computer Worm

  • Computer Virus

  • Computer Bacteria

  • Trojan Horse

Solution

B.

Computer Virus

D.

Trojan Horse

(i) Pen drive containing Computer Virus / Trojan Horse was used before the abnormal functioning started, which might have corrupted the system files.
(ii)Computer Virus/ Trojan Horse affects the system files and start abnormal functioning in the computer

Question
CBSEENCO12011558
Wired Faculty App

Jai is an IT expert and a freelancer. He recently used his skills to access the Administrator password for the network server of Megatech Corpn Ltd. and provided confidential data of the organization to its Director, informing him about the vulnerability of their network security. Out of the following options (i) to (iv), which one most appropriately defines Jai. Justify the reason for your chosen option:

  • Hacker

  • Cracker

  • Operator

  • Network Admin

Solution

A.

Hacker

A Hacker is a person who breaks into the network of an organization without any malicious intent.

Question
CBSEENCO12011604
Wired Faculty App

Janish Khanna used a pen drive to copy files from his friend’s laptop to his office computer. Soon his office computer started abnormal functioning. Sometimes it would restart by itself and sometimes it would stop different applications running on it. Which of the following options out of (i) to (iv), would have caused the malfunctioning of the computer? Justify the reason for your chosen option:

  • Computer Virus

  • Spam Mail

  • Computer Bacteria

  • Trojan Horse

Solution

A.

Computer Virus

D.

Trojan Horse

Computer virus can spread through external media such as CDs, pen drive etc. It is designed to infect the host program and gain control over the system without the owner’s knowledge.

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