| Class XII |
Computer Science |
Computer Science |
13 |
learning (Figure 13.1) are : (1) Identification of a project: The project idea may come through any real-life situation. For example, one could thi... |
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| Class XII |
Computer Science |
Computer Science |
11 |
protocol ensures that each computer or node connected to the Internet is assigned an IP address, which is used to identify each node independently.... |
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| Class XII |
Computer Science |
Computer Science |
11 |
known as wireless media. • The capacity of channels is measured in bandwidth. The unit of bandwidth is Hertz. • Communication can be done in three ... |
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| Class XII |
Computer Science |
Computer Science |
11 |
that uses a client-server model of communication in which a user or machine (a client) requests a service by a server in the network. E xercise 1. ... |
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| Class XII |
Computer Science |
Computer Science |
12 |
a p te C h r 12 Security Aspects “Treatyourpasswordlikeyour toothbrush.Don'tletanybodyelseuseit, andgetanewoneeverysixmonths.” — CliffordStoll In t... |
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| Class XII |
Computer Science |
Computer Science |
12 |
1985 and has been borrowed from biological science with almost similar meaning and behavior, the only difference is that the victim is a computer s... |
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| Class XII |
Computer Science |
Computer Science |
12 |
is a type of malware that targets user data. It either blocks the user from accessing their own data or threatens to publish the personal data onli... |
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| Class XII |
Computer Science |
Computer Science |
12 |
An adware displays online advertisements using pop-ups, web pages, or installation screens. Once an adware has infected a substantial number of com... |
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| Class XII |
Computer Science |
Computer Science |
12 |
(Figure 12.4), thereby making it very difficult for a keylogger software to know or record the key(s) pressed by the user. Figure 12.3: A QWERTY ke... |
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| Class XII |
Computer Science |
Computer Science |
12 |
the mechanism to combat them. As the saying goes that prevention is better than cure, we list some preventive measures against the malware discusse... |
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| Class XII |
Computer Science |
Computer Science |
12 |
Signature-based detection In this method, an antivirus works with the help of a signature database known as “Virus Definition File (VDF)”. This fil... |
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| Class XII |
Computer Science |
Computer Science |
12 |
activated after some time. Such malware needs to be checked on a real-time basis. In this technique, the anti-malware software keeps running in the... |
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| Class XII |
Computer Science |
Computer Science |
12 |
from hackers. Hence, HTTP is sufficient for websites with public information sharing like news portals, blogs, etc. However, when it comes to deali... |
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| Class XII |
Computer Science |
Computer Science |
12 |
ookies Assume students in a class are to finish The term "cookie" was derived from the term "magic their project. For cookie" used by Unix programm... |
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| Class XII |
Computer Science |
Computer Science |
2 |
myfile.txt is opened N otes in append and read modes. The file object will be at the end of the file. That means we can write data at the end of th... |
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| Class XII |
Computer Science |
Computer Science |
12 |
Also, try to locate some cookie files on while filling an online form. This auto-fill feature is also your computer implemented by websites using c... |
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| Class XII |
Computer Science |
Computer Science |
12 |
and loopholes. Technically, white hats work against black hats. 12.8.2 Black Hats: Crackers If hackers use their knowledge unethically to break the... |
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| Class XII |
Computer Science |
Computer Science |
12 |
Service (DDoS) is an attack, where the flooded requests come from compromised computer (Zombies) systems distributed across the globe or over a ver... |
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| Class XII |
Computer Science |
Computer Science |
12 |
monitoring the packets adequately. The hacker takes advantage of this congested and chaotic network environment to sneak into the system undetected... |
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| Class XII |
Computer Science |
Computer Science |
5 |
5 -9 1 4 7 8 13 Indicates the smaller element in a comparisson Indicates the elements in the sorted list -9 1 4 7 8 13 Sorted List Unsorted List In... |
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| Class XII |
Computer Science |
Computer Science |
12 |
11 00 11 00 0 0 0 0 0 1 11 10 11 11 10 11 010 011 0101 1000 Figure 12.6: Eavesdropping are usually the private communication channels like phone ca... |
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| Class XII |
Computer Science |
Computer Science |
12 |
user into installing it, it acts pretty much like a virus or a worm. • Spyware records and sends the collected information to an external entity wi... |
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| Class XII |
Computer Science |
Computer Science |
12 |
computer systems or computer networks and gain access to unauthorised information. • If a hacker uses its knowledge to find and help in fixing the ... |
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| Class XII |
Computer Science |
Computer Science |
12 |
of malware infection. 11. List some preventive measures against malware infection. 12. Write a short note on different methods of malware identific... |
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| Class XII |
Computer Science |
Computer Science |
13 |
ha p te r C Project Based Learning “Anideathatisdevelopedandputinto actionismoreimportantthanideathat existsonlyasanidea.” — GautamBuddha In this C... |
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