INTERNET AND VIRUSES
Fill in the blanks
1. -------------------- is called as ‘Networks of Networks’.
Ans: Internet
2. ARPA stands for --------------------.
Ans: Advanced Research Project Agency
3. Mailing list is also called ------------------------.
Ans: listservs
4. To find out a newsgroup ------------------------- article may be used.
Ans: Frequently Asked Questions,
5. ISP is the abbreviation of -----------------.
Ans: Internet Service Provider
6. ------------------- is a collection of protocols that govern the way data travels from one machine to another across networks.
TCP/IP
7. Documents can be accessed directly from other documents using -------------- code.
Ans: HTML
8. The first page in a series of related documents or site is called -------------------
Ans: home page
9. A browser is a ------------------ program defined to provide a user friendly interface on the Website.
Ans: software
10. WAIS stands for ---------------
Ans: Wide Area Information Service
11. Alta Vista and similar other search engines use a software program called ----- or ------------------
Ans: spider, robot
12. Telnet operates on ------------------- principle.
Ans: client/server
13. E-mail that fails to reach its destination and returns to the sender is called -----
Ans: bounce
14. A client program used to read the web is called ---------------
Ans: browser
15. ----------------------- is another name for Usenet.
Ans: Netnews
16. A ---------------- is a program that can pass on malicious code to other non-malicious programs by modifying them.
Ans: virus
17. ---------------- is the writer of the program or the person who causes its distribution.
Ans: Agent
18. A ------------------------ is a program that spreads copies of itself through a network.
Ans: worm
19. When a computer is started the control begins with -----------------------
Ans: firmware
20. A virus that can change its appearance is called -----------------------
Ans: polymorphic virus
21. -------------------- can persist in production programs because the developers forget to remove them
Ans: trapdoors
22. ------------------- is the general name for undesired effects in a program.
Ans: malicious code or rogue program
22. A ------------------ virus has a life that depends on the life of its host.
Ans: transient
23. ------------- triggers action when condition occurs.
Ans: logic bomb
24. ---------------- is a virus that self-replicates without bound.
Ans: Rabbit
25. Terminating to kill a file or process is called ----------------
Ans: nuke
26. When reading news to mark all the articles in a newsgroup as read to clean the slate is referred to a ---------------------
Ans: Catch up
27. The CSLIP is a faster version of SLIP in which Internet address information is -----------------------
Ans: compressed
28. The only way to prevent the infection of a virus is not to share ------------------- with an infected source.
Ans: executable code
29. AMT stands for -------------------
Ans: Address Mapping Table
30. The traffic of posted articles in the Usenet newsgroups is referred to as --------
Ans: Usenet news
31. ----------------------- is text that is specially coded using a standard system called HTML.
Ans: Hypertext
32. ----------------------- is a systematic way to identify people, computers and Internet resources.
Ans: Internet addressing
33. ---------------- is the way to identify and locate computers connected to the Internet.
Ans: Domain name
34. ----------------- allows information to be sent between computers and people on the Internet
Ans: E-mail
35. A ------------------------ identifies a particular e-mail address.
Ans: URL
36. A -------------------- is a single unit of information called document that is available via WWW
Ans: web page
37. The way of defining the formats of text in a page is called -----------------
Ans: HTML
38. ------------------ is a system that defines and standardizes the structure of documents.
Ans: SGML
39. The process of visiting different websites on the Internet hosted by various companies, organizations etc are called -------------------
Ans: Internet browsing or net surfing
40. ------------------ is designed to assist users in locating information on the World Wide Web.
Ans: Web index
41. SGML stands for -------------------
Ans: Standard Generalized Markup Language
42. Pegascus is a popular free ------------------ program.
Ans: E-mail
43. MIME stands for ------------------------
Ans: Multipurpose Internet Mail Extension
44. The Internet browser software are --------------------
Ans: Internet Explorer
45. --------------------- is a multi-user chat system that allows many people to communicate simultaneously across the Internet in real time.
Ans: Internet Relay Chat
46. ------------------ is a tool that helps users locate information available via WWW.
Ans: Web meta-searcher
47. ------------------- is an interactive tool to help people locate information via WWW.
Ans: Web search engine
48. Web index use ---------------- links to present their list of resources, which facilitates browsing.
Ans: hypertext
49. ---------------- browser allows the user to view images on their computer.
Ans: Graphical
50. UUCP stands for ----------------------
Ans: UNIX to UNIX Copy Protocol
True or False
1 A more common means of virus activation is an attachment to an e-mail message
Ans: true
2 Viruses can infect only Microsoft Windows Systems.
Ans: false
3 Cello is an integrated web browser and general Internet tool for windows.
Ans: true
4 Web index is not a search tool.
Ans: false
5 WAIS cannot search in more than one database.
Ans: false
6 Viruses can modify hidden or read-only files.
Ans: true
7 Viruses can appear only in data files.
Ans: false
8 Viruses spread only on disk.
Ans: false
9 Viruses can appear only in Word documents or programs.
Ans: false
10 Viruses cannot remain in memory after a complete power off/power on reboot.
Ans: true
11 Viruses cannot infect hardware.
Ans: true
12 Viruses can be malevolent, benign or benevolent.
Ans: true
13 The worm’s primary effect is resource exhaustion.
Ans: true
14 A virus writer may want a virus to do several things at the same time, namely spread infection, avoid detection, and cause harm.
Ans: true
15 A virus is effective only if it has some means of transmission.
Ans: true
16 TCP divides message into streams of small packets.
Ans: true
17 The Online Information Service Prodigy has well established in advertising.
Ans: true
18 The WWW is a graphical, hypertext navigation toll.
Ans: true
19 Any high-speed modem can be purchased without the knowledge of ISP.
Ans: false
20 To connect external modem you do not require COM port.
Ans: false
21 The PC card modems are smaller in size and is mainly used in laptop computers
Ans: true
22 Two machines can have same IP address.
Ans: false
23 FTP is a protocol which allows files to be transferred between two computers.
Ans: true
24 A browser is a piece of software that acts as an interface between the user and inner-workings of the Internet.
Ans: true
25 Domain names are unique.
Ans: true
26 MIME allows the user to access Internet resources on other computers around the world.
Ans: false
27 Gopher was designed to work with a variety of different Internet stand alone services.
Ans: true
28 WAIS is an Internet search tool that is based on the Z49.50 standard.
Ans: false
29 Internet Explorer is a text based browser.
Ans: false
30 Fireare is a security on the Internet.
Ans: true
31 Fidonet is a network of BBS’s with Internet e-mail access.
Ans: true
32 Get is a FTP command to copy or get a file from a remote source.
Ans: true
33 Eudora is one of the most popular and dependable Internet e-mail program.
Ans: true
34 Lynx is a graphic browser.
Ans: false
35 AltaVista is a meta-search engine.
Ans: false
36 Meta-searchers do not provide a database.
Ans: true
37 FTP sites that allow anonymous FTP do require a password for access.
Ans: false
38 The WELL is a famous service provider and on-line community.
Ans: true
39 The place where missing e-mail messages or Usenet posts are said to have disappeared to is called black hole.
Ans: true
40 A program virus cannot attach itself to the program.
Ans: false
41 Majority of Viruses execute more than once, spreading their infection and causing their effect.
Ans: false
42 The most popular virus are called document virus.
Ans: true
43 The firmware does its control transfer by reading a fixed number of bytes from boot sector.
Ans: true
44 The popular home for virus is system program
Ans: false
45 The term “jack in” represents log on to the Internet
Ans: true
46 Intranet is a private network that uses the standard Internet protocols.
Ans: true
47 The Hotjava is a web browser.
Ans: true
48 IGP is a protocol that defines how routing information is distributed among routers in a network.
Ans: true
49 .net is an Internet domain corresponding to constituent networks.
Ans: true
50 Virus propagates copies of itself through a network.
Ans: false
Answer the following
1. What is Internet?
2. How does Internet work?
3. What are the differences between dial-up connection and direct connection?
4. What are the different protocols available in the Internet?
5. What is TCP/IP and how does it work?
6. How are addresses defined on Internet?
7. What is a URL?
8. What is HTTP and how does it work?
9. What is a domain name?
10. What is the difference between IP address and domain name?
11. What is Telnet?
12. Explain browser and its working?
13. What are hypertext links and where they are used?
14. What is the difference between Netscape and Lynx?
15. What are helper applications and why are they important?
16. What is HTML and its importance?
17. What are web indexes?
18. What are search engines? Give example?
19. What are meta-search engines?
20. Describe HTML tags?
21. How meta-search engines different from normal search engines?
22. What are the two types of search tools?
23. What are viruses?
24. How viruses infect programs?
25. What are the sources of viruses?
26. How we can prevent virus infection?
27. What are polymorphic viruses?
28. Explain various virus effects?
29. Describe memory-resident virus?
30. The virus writer may find various qualities in appealing a virus. What are they?
Write short notes on
1. Why Internet is called ‘Networks of Networks’? What is the speciality of Internet?
2. Describe the various modes of accessing Internet?
3. Compare Internet and Intranet? What are the various security issues associated with them?
4. Explain various Internet protocols?
5. Compare the various features of FTP and HTTP?
6. What is Gopher?
7. What is WAIS?
8. Explain Internet addressing technique?
9. What is the purpose of URL?
10. What is meant by World Wide Web?
11. Explain briefly about web pages?
12. What is HTML?
13. What are web browsers?
14. Explain the tools used for searching web?
15. What are search engines?
16. What is IRC?
17. What are sector virus and macro virus?
18. Explain various kind of malicious code?
19. How the virus attach?
20. What are the various issues of viral residence?
21. How virus infection can be prevented? Explain.
22. What are the truths and misconceptions about viruses?
23. What is Brain virus? How it spreads?
24. What are web bugs?
25. Explain file infectors, Web applet virus, and Polymorphic virus?
