Web Applications and Security Class 10 IT-402

Web Applications and Security Class 10

Q1. The speed of a network is measured in

(a) Mbps

(b) bytes

(c) KHz

(d) None of these

Ans. (a) Mbps

Q2. When you come online on Yahoo Messenger and you receive requests with some options as

(a) Accept

(b) Decline

(c) Block

(d) All of these

Ans. (d) All of these

Q3. Which of the following is/are best practice(s) for internet security?

(a) Use a secure password

(b) Use encryption software

(c) Keep software up to date

(d) All of the above

Ans. (d) All of the above

Q4. Which of the following is an application program that is stored on a remote server and delivered over the Internet?

(a) Web application

(b) System application

(c) Internet application

(d) None of the above

Ans. (a) Web application

Q5. A computer connected with LAN

(a) work fast

(b) go online

(c) can e-mail

(d) can share information or peripheral devices

Ans. (d) can share information or peripheral devices.

Q6. A group of computers connected together with the help of cables within an office building is called

(a) PAN

(b) WAN

(c) MAN

(d) LAN

Ans. (d) LAN

Q7. A network formed between computers that are spread across the continents is called

(a) LAN

(b) WAN

(c) MAN

(d) WLAN

Ans. (b) WAN

Q8. Digital information is converted into analog information by the modem at

(a) destination computer

(b) source computer

(c) Both (a) and (b)

(d) Neither (a) nor (b)

Ans. (b) source computer.

Q9. Modulation and demodulation are performed by

(a) microwave

(b) satellite

(c) modem

(d) fibre optic

Ans. (c) modem

Q10. A modem is connected in between a telephone line and a

(a) computer

(b) serial port

(c) network

(d) communication adapter

Ans. (a) computer

Q11. Which of the following is not a transmission medium?

(a) Telephone lines

(b) Cu-axial cable

(c) Modem

(d) Microwave

Ans. (c) modem

Q12. What can you do with the Internet?

(a) Exchange information with friends and colleagues

(b) Access pictures, sounds. video clips and other media elements

(c) Find diverse perspectives on issues from a global audience

(d) Internet exchange information, access pictures, find diverse perspectives on issues from a global audience.

Ans. (d) Internet exchange information, access pictures, find diverse perspectives on issues from a global audience.

Q13. The first network was

(a) ARPANET

(b) Internet

(c) NSFnet

(d) NET

Ans. (a) ARPANET

Q14. Which of these services will not be provided by a typical Internet Service Provider (ISP)?

(a) An e-mail address

(b) Modem

(c) A connection to the Internet

(d) Technical help

Ans. (a) An e-mail address

Q15. To join the Internet, the computer has to be connected to a

(a) Internet architecture board

(b) Internet society

(c) Internet Service Provider

(d) None of above

Ans. (c) Internet Service Provider

Q16. Wireless broadband can be

(a) mobile

(b) fixed

(c) Both (a) and (b)

(d) None of these

Ans. (c) Both (a) and (b)

Q17. "Nick connects to the Internet at home using a laptop computer with a wireless connection. Nick is going to change to a desktop computer using a 1 Gbps ethernet cable connection." Which of these should be the result of making the changes?

(a) Increased portability and decreased speed

(b) Decreased portability and increased speed

(c) Increased portability and increased speed

(d) Decreased portability and decreased speed

Ans. (b) Decreased portability and increased speed

Q18. A collection of web pages linked together in a random order is

(a) a website

(b) a web server

(c) a search engine

(d) a web browser

Ans. (a) A website

Q19. Homepage helps viewers to find out what they can find on the particular site? Homepage is the

(a) the first page of a website

(b) index page

(c) about page

(d) None of these

Ans. (a) the first web page of a website

Q20. Which client software is used to request and display web pages?

(a) Webserver

(b) Multimedia

(c) FTP

(d) Web browser

Ans. (d) Web browser

Q21. _______ is an example of a text-based browser that provides access to the Internet in the text-only mode.

(a) Mozilla Firefox

(b) Lynx

(c) Internet Explorer

(d) All of these

Ans. (b) Lynx

Q22. In URL, http://www.example.com/index.htm, which component identify the website

(a) http

(b) www.example.com

(c) /index.htm

(d) All of these

Ans. (b) www.example.com

Q22. In URL, http://www.example.com/index.htm, which component identifies the path of a web page?

(a) http

(b) www.example.com

(c) /index.htm

(d) All of these

Ans. (c) /index.htm

Q23. A web page is located using a

(a) Universal Record Linking

(b) Uniform Resource Locator

(c) Universal Record Locator

(d) Uniformly Reachable Links

Ans. (b) Uniform Resource Locator

Q24. Instant messaging service accepts instant messages from

(a) external sites

(b) internal sites

(c) Both (a) and (b)

(d) None of these

Ans. (a) external sites

Q25. Which of the following is an application-based instant messaging software?

(a) Google Talk

(b) eBuddy

(c) Meebo

(d) MSN Web Messenger

Ans. (a) Google Talk

Q26. A blog consists of

(a) images

(b) text

(c) links

(d) All of these

Ans. (d) All of these

Q27. ________ is the act of posting content on a blog.

(a) Edublog

(b) Posting

(c) Blogging

(d) Blogger

Ans. (c) Blogging

Q28. Which of the following offers es blog service?

(a) Drupal

(b) Joomla

(c) Wordpeess.com

(d) All of these

Ans. (d) All of these

Q29. Qumana is an offline blog editor which is used for _______ operating system(s).

(a) Windows

(b) Mac

(c) Both (a) and (b)

(d) None of these

Ans. (c) Both (a) and (b)

Q30. Which of the following websites is used for booking train tickets?

(a) Nykaa

(b) IRCTC

(c) RedBus

(d) Myntra

Ans. (b) IRCTC (Indian Railway Catering and Tourism Corporation)

Very Short Answer Type Questions

Q1. Name the term defined by the given below statement:

"A group of computers connected to each other by a link."

Ans. A computer network is defined as a group of computers connected to each other by a link that allows sharing of resources and information.

Q2. What is the definition of networking?

Ans. Computer networking is the practice of exchanging information/services between two or more computers together for the purpose of sharing data.

Q3. What are the main types of computer networks?

Ans. Following are the three main types of computer networks. based upon the geographical area as follow:

Local Area Network (LAN)
Metropolitan Area Network (MAN)
Wide Area Network (WAN)

Q4. What is the main purpose of the switch?

Ans. A switch is a hardware device that is used to connect devices or segments of the network with smaller subsets of LAN segments.

Q5. Identify the following devices:

(i) A device that is used to connect different types of networks. It performs the necessary translation so that the connected networks can communicate properly.

Ans. Router

(ii) A device that converts data from digital bit stream into an analog signal and vice-versa.

Ans. Modem

Q6. What is the advantage of mesh topology?

Ans. In a mesh topology, each node is connected to more than one node, so that it provides an alternative route, in case, if the host is either down or busy.

Q7. Give the names of models of computer networking.

Ans. There are mainly two models of computer networking as follows:

Peer-to-Peer network
Client-saver network

Q8. How many techniques are used for transmitting data across networks?

Ans. There are three techniques used for transmitting data across networks: circuit switching, packet switching and message switching.

Q9 Why Internet is called a network of networks?

Ans. Internet is called a network of networks because it connects several large and all heterogeneous networks together into a bigger network.

Q10. Write two advantages of using the Internet.

Ans. Advantages of using the Internet are as follows:

It is used for communication, entertainment, searching information and for providing many types of services.
It provides the facility of e-mail.

Q11. Name any five DSL broadband service providers in India.

Ans. BSNL, Airtel, Reliance, MTNL and Tata Indicom are the five DSL broadband service providers in India.

Q12. Write the name of any two Internet Service Provider(ISP) in India.

Ans. MTNL and Airtel are the two Internet Service Provider(ISP) in India.

Q13. Name any two ways of wireless connections of the Internet.

Ans. Wi-Fi and WiMax are the two ways of wireless connections of the Internet.

Q14. Ramya wants to connect all the computers in her office wirelessly in order to avoid clumsy cables. Which wireless technology would be best suitable for her office?

Ans. Wi-Fi technology would be best suitable for her office to avoid cabling. Because it allows high-speed Internet connection without the use of cables or wife.

Q15. Write the full form of the following terms.

Ans.

(i) WiMAX: Worldwide Interoperability for Microwave Access.

(ii) BPL: Broadband over Power Line.

Q16. What can a user do with WWW?

Ans. Using WWW (World Wide Web), a user can download files, listen to Music, view video files and jump to other documents or websites by using hypertext links.

Q17. Name any two major services provided by the Internet.

Ans. E-mail and WWW are the two major services provided by the Internet.

Q18. Mr Lal owns a factory that manufactures automobile spare parts. Suggest to him the advantages of having a web page for his factory.

Ans. The web page provides information to the clients about his factory of spare parts. Moreover, he can receive the order on the Internet from the clients using the web page.

Q19. Name two web browsers of the Internet.

Ans. Internet Explorer and Google Chrome are the two web browsers of the Internet.

Q20. Can we use a URL to access a web page? How?

Ans. Yes, as a location on a web server, which is called a website and each website has a unique address known as URL. So, an URL can be used to access a web page.

Q21. What is a URL?

Ans. URL means Uniform Resource Locator. It is a unique address of a web page on the Internet. It specifies the Internet address of a file stored on a host computer connected to the Internet.

Q22. Identify Web addresses and E-mail addresses from the following.

(i) www.example.com

(ii) aba@example.com

(iii) www.example.co.in

(v) 123@example.co.in

Ans. Key features of Instant Messaging are

(i) and (iii) are web addresses.

(ii) and (iv) are email addresses.

Q23. Write any two key features of an Instant Messaging (IM).

Ans. Key features of Instant Messaging are:

(i) Video calling

(ii) Language translation

Q24. List any live application based instant messaging software.

Ans. Whatsapp, Viber, Skype, WeChat, Google Talk.

Q25. Who is a blogger?

Ans. A person who writes a blog or a weblog is known as blogger. Blogging is the act of posting content on a blog.

Q26. List any 5 websites that provide blog services.

Ans. Joomla, WordPress.com, Drupal, Blogger, Tumblr.

Q27. Explain the purpose of a blog.

Ans. The main purpose of blog is to convey messages about events, announcements, need. review etc. Blogs are usually managed using a web browser and this requires an active internet connection.

Q28. Write any two blog platforms with Qumana works.

Ans. Two blog platforms with Qumana works:

(i) Drupal (ii) Diary Land

Q29. Explain the purpose of online transactions.

Ans. The online transaction helps us to save many things like paper which is used for making notes, time which is spent on transactions and counting.

Q30. List any five websites that allow online transactions.

Ans. Amazon, Flipkart, RedBus, Myntra, IRCTC.

Q31. What do you mean by Cash on Delivery?

Ans. Cash on Delivery (COD) is a feature provided by some websites where the users can pay once they receive the product.

Short Answer Type Question

Q1. Write down any three points of differences between LAN, MAN and WAN.

Ans. Three major points of differences among LAN, MAN and WAN are as follows:

Basis	LAN	MAN	WAN
Geographic Area	Generally within a building.	Within a city	Across the continents
Distance	Up to 5 km	Up to 160 km	Unlimited
Speed	11 to 54 Mbps	11 to 100+ Mbps	10 to 384 Kbps, 1.83 to 7 2 Mbps

Q2. Explain the LAN and WAN.

Ans.

LAN: A Local Area Network (LAN) is a computer network covering a small geographical area like home. office or small group of buildings such as buildings in a school. Computers connected to a LAN can share information and peripheral equipment.

WAN: A Wide Area Network (WAN) is used to connect LANs and other types of networks together so that users and computers in one location can communicate with users and computers in other locations.

Q3. What is the use of a repeater in a network?

Ans. In a network, the repeater receives a weak signal coming from a source and amplifies it to its original strength and then again forwards it to the destination. Basically, repeaters are used in a network so that a signal can travel a longer distance.

Q4. When the computer network uses telephone lines as a communication channel then MODEM is used as a data communication device. Now, explain the working of MODEM.

Ans. MODEM performs the task of modulation at the sender's site and demodulation at the receiver's site. Basically, our computer generates data in the form of digital signals which need to be forwarded to the receiver through telephone lines. Since telephone lines can carry only analog signals. So, digital signals need to be converted to analog signals at the sender's site this is called modulation. At the receiver's site, again analog signals should be converted back to the original digital signals. then this is called demodulation.

Q5. What are the differences between star topology and bus topology of the network?

Ans. Differences between star topology and bus topology are as follows:

Star Topology	Bus Topology
All the nodes are directly connected with the central node or server.	There is a single length of the transmission medium, on which various nodes are attached and the server can be anywhere in the transmission cable.
Faults can be easily detected.	Faults cannot be easily detected.
It is fast in transmission.	Becomes slow with the increase in nodes.

Q6. What do you mean by tree topology?

Ans. It is an extension and variation of bus topology. Its basic structure is like an inverted tree, where the root acts as a server. In tree topology, the node is interlinked in the form of the tree. If one node fails, then the node following what node gets detached from the main tree topology.

Q7. Difference between circuit switching and packet switching.

Ans. Differences between circuit switching and packet switching are as follows:

Circuit Switching	Packet Switching
Initially designed for voice communication.	Initially designed for data transmission.
Inflexible, because once a path is set all parts of a transmission follows the same path.	Flexible, because a route is created for each packet to travel to the destination.
It is connection-oriented.	It is connectionless.

Q8. Elucidate the following terms.

(i) PAN (ii) WiMAX (iii) Satellite

Ans.

(i) PAN: It stands for Personal Area Network. It is a computer network used for communication among computers and different technological devices close to it.

(ii) WiMAX: It stands for Worldwide Interoperability for Microwave Access. It is a wireless transmission of data using a variety of transmission modes.

(iii) Satellite: Which are orbiting around the Earth, provide necessary links for telephone and television service.

Q9. How many types of web browsers? Explain them.

Ans. There are two types of web browsers, which are as follows:

(i) Text Web Browser: A web browser that displays only text-based information is known as the text web browser.

e.g. Lynx

(ii) Graphical Web Browser: A web browser that supports both text and graphics information is known as the graphical web browser.

e.g. Internet Explorer, Firefox, Netscape, Safari, Google Chrome, Opera etc.

Q10. Why do we use instant messaging?

Ans. Instant messaging is a set of communication technologies used for text-based communication between two or more participants over the Internet or other types of networks. Many instant messaging services offer video calling features, voice over IP and web conferencing services. Web conferencing services can integrate both video calling and instant messaging abilities.

Q11. How can you launch Google Talk?

Ans. To launch Gook Talk, follow the given steps:

Step1: Click on the Start button → All Programs

Step2: Click on Google Talk and then double click on Google Talk.

Q12. Write the steps to create a new post in Qumana.

Ans. To create a new post in Qumana, follow the below steps:

Step1: Click on the New Post option. A window will appear.

Step2: Type the title and content of the post in respective fields.

Step3: Click on Publish Post button.

Q13. What are the benefits of online shopping?

Ans. Some benefits of online shopping are:

It provides the products with better prices.
It can give us an opportunity to shop 24×7.
We can get more varieties of products.
We can send gifts more easily to our relatives and friends.
We can also buy older products at lesser prices.
There is no crowd while online shopping.

Q14. What is Internet security? Also, explain their uses.

Ans. It is a branch of computer security that deals specifically with Internet-based threats. Internet security prevents attacks targeted at browsers, networks, operating systems and other applications. The aim of Internet security is to set up precise rules and regulations that can deflect attacks that arise from the Internet. Internet security relies on particular resources and criteria for safeguarding the data that is communicated or transferred online.

Long Answer Type Question

Q1. How to make the computer easier to use in windows?

Ans. You can adjust many of these settings the make the computer easier to see page in the Ease of Access Center. Open the Ease of Access Center, then select the options that you want to use.

Choose High Contrast: This allows you to set a high contrast color scheme that heightens the color contrast of some text and images on your computer screen.

Remove Background Images: This turns off all unimportant, overlapped content and background images to help make the screen easier to use.

Q2. What is a computer network? Why do we need networking in our system?

Ans. A computer network is a collection of computers and other hardware interconnected by communication channels, which allows sharing of resources and information. We need networking for many reasons, which makes it fast and easy. Some of them are given below:

(i) File-Sharing: Data files can be shared.

(ii) Hardware Sharing: It can share devices, such as printers, scanners, CD-ROM devices etc.

(iii) Application Sharing: We are able to share the applications of the different systems within a network.

(iv) User Communication: It allows users to communicate easily.

(v) Access to Remote Database: It allows users to access the database from any system in the network.

Q3. How can you transfer data on the network?

Ans.

Data Transfer on Network

Switching techniques are used for transmitting data across networks. Different types of switching, techniques are employed to provide communication between two computers. These are

1. Circuit Switching

It is a methodology of implementing a telecommunication network in which two network nodes establish a dedicated communication channel (circuit), first through the network and then the message is transmitted through the channels.

2. Message Switching

It is a network switching technique, in which data is routed entirely from the source node to the destination node. In this technique, no physical path is established between source and destination in advance. During message routing, every intermediate switch in the network stores the whole message.

3. Packet Switching

In packet-based networks, the message gets broken into small data packets. These packets are sent out from the computer and they travel around the network seeking out the most efficient route to travel as circuits become available.

Q4. Why is the Internet called the 'Network of Networks'?

Ans. Internet is called 'Network of Networks' because it is a global network of computers that are linked together by cables and telephone lines making communication possible among them. It can be defined as a global network of over a million smaller heterogeneous computer networks.

The network which consists of thousands of networks spanning the entire globe is known as the Internet. The Internet is a worldwide collection of networked computers, which are able to exchange information with each other very quickly.

Most people use the Internet in two ways, E-mail and World Wide Web. On the Internet, most computers are not connected directly, they are connected to smaller networks, which in turn are connected through gateways to the Internet backbone.

A gateway is a device that connects dissimilar networks. A backbone is a central interconnecting structure - that connects one or more networks.

Q5. Explain the following term.

(i) World Wide Web (ii) Website () Wep Page (iv) Web Browser (v) Web Server

Arts. Refer to text

6. Give an example of E-mail address and explain each part of it.

Ans. The example of an E-mail address is abc@gmail.com, The format of E-mail address is username@hostname or domain name. So, as per the above example of E-mail address abc is the username and gmail.com is the name of hosting server or host (domain) name. Thus, we can say that E-mail address has two parts separated by '@' symbol. (i) Username On the left side of separator @ is the user name. A user name cannot have blanks. (ii) Domain Name for the Host Server The portion to the right of @ identifies the server or host network that services your E-mail. It is also known as E-mail

server.

7. What do you mean by Instant Messaging? Also explain one Instant Messaging software. [CBSE Textbook] Ansinstant Messaging (IM), form of text based communication in which two persons participate in a single conversation over their computers or mobile devices within an Internet based chatroom. Various softwares provide instant messaging services as Whatsapp, Google Talk, SItype, Meebo, eBuddy etc. Google Talk

It is an instant messaging and VoIP service developed by Google. This dient lets you to log in to the service to chat and hold video-conferences with your friends from the Windows desktop.

Q1. What is networking?

Ans. A computer network is a collection of computers and other hardware components interconnected by communication channels (cables or satellites) that allow sharing of resources and information.

Q2. What are the advantages of networking?

Ans. Some of the advantages associated with networking are:

Data Sharing: One of the most important uses of networking is to allow the sharing of data. Users can send text files, spreadsheets, documents, presentations, audio files, video files, etc. to other users.

Hardware Sharing: Hardware components such as printers, scanners, etc. can also be shared. For example, instead of purchasing 10 printers for each user, one printer can be purchased and shared among multiple users thus saving cost.

Internet Access Sharing: You can purchase a single Internet connection and share it among other computers in a network instead of purchasing multiple Internet connections for each computer. This is very commonly found in Internet café (browsing centers), schools, colleges, companies, etc.

Usage of network-based applications: Such as web browsers, email clients, chat applications, audio & video calling, etc. is another advantage.

Q2. What are the advantages of networking?

Ans. Coming Soon...........

Q3. What are the different types of networking? "OR" Explain LAN and WAN.

Ans. There are two major types of network Local Area Network (LAN) and Wide Area Network (WAN).

Local Area Network:

A local area network (LAN) is one that connects computers and devices in a limited geographical area such as home, school, computer laboratory, office building, or closely positioned group of buildings.

Usually, local area networks offer very high speeds and are used for connecting computers and peripherals such as printers, scanners, etc.

Wide Area Network:

A wide area network (WAN) is one that covers a broad area (i.e., any network that links across metropolitan, regional, or national boundaries). The Internet is the most popular WAN and is used by businesses, governments, non-profit organizations, individual consumers, artists, entertainers, and many others.

Q4. List any five application-based instant messaging software.

Ans. Application-based instant messaging software is downloaded and installed on the user’s computer. Some of the popular instant messaging software are:

Google Talk
Yahoo! Messenger
Skype
Windows Live Messenger
Rediff Bol

Q5. What do you mean by instant messages?

Ans. Instant messaging (IM) is a form of communication over the Internet that offers an instantaneous transmission of text-based messages from sender to receiver. Most instant messaging software includes the option for performing file transfers, audio chat, video calling and conferencing, sharing desktops, etc. apart from standard text chat. Instant messaging software is widely used for personal and commercial use.

Q6. State any three rules and etiquettes to be followed while chatting on the Internet.

Ans. There are some general rules and etiquette to be followed while chatting. They are almost the same as those that apply for emails.

Messages should be short and to the point.
Always introduce yourself by name if your screen name doesn’t reflect it.
Always ask if the other person has time to chat first - regardless of how important you think what you have to say is, it’s not going to be well received if the recipient is busy.
In a business environment, know exactly what you want to discuss.
Typing your messages in uppercase is extremely rude - it’s considered shouting and very aggressive.
Give people time to respond - Multiple questions sent to a recipient before they’ve had a chance to answer can seem more like an interrogation rather than a conversation.
Wherever possible, give the person you are communicating with your undivided attention. It’s not just a sign of respect, but if you have multiple conversations happening or are allowing other issues to distract you, you may miss an important point in the other person’s messages or lose the gist of the conversation.
It’s important to properly end an IM conversation - you may think the chat is over, but the other person may not. While you’re off doing other things, they may be sitting there staring at the screen waiting for further communication from you!

Q7. What are the basic needs to use instant messaging (chat) software?

Ans. Before, start using Yahoo! Messenger, a Yahoo Mail account is required. If you don’t have a Yahoo! Mail Account already you can use the built-in option for creating a new Yahoo! Mail Account.

You should list contacts that are available for chat. If you don’t have any contacts, you can add their Yahoo Mail account to your contact list by sending an invite.

Q8. Explain the purpose of a blog.

Ans. A blog is a discussion-style site used by non-technical (or technical users) users for creating personal web pages. Blogs are similar to an online personal diary and simple to use.

We can use a blog to convey messages about events, announcements, news, reviews, etc. Blogs are usually managed using a web browser and this requires an active internet connection.

Q9. List any 5 websites that provide blog service.

Ans. There are hundreds of websites that offer blog services for free. Some of the popular blogs include:

www.WordPress.com
www.blogger.com
www.blog.com
www.weebly.com
www.blogsome.com

Q10. Difference between web page and website.

Ans. Web page and Website are relevant but distinct words.

A web page can be considered as a single entity whereas a website is a combination of web pages. Web pages are accessed through a browser while on website HTTP, and DNS protocols are used to access them.

Q11. Explain the purpose of an offline blog editor.

Ans. If we do not have an active internet connection, we can create blogs using a blog application and publish the blog whenever internet connectivity is available.

Q12. List any five offline blog editors.

Ans. There are several free offline blog editors available that can be downloaded and installed on the local computer such as

Qumana
Windows Live Writer
Blogdesk
MarsEdit
BlogJet
Blogo

Q13. Explain the purpose of online transactions.

Ans. Online shopping is a form of electronic commerce where customers can buy or sell goods over the Internet. Customers need to have an active internet connection for viewing goods or services offered by a seller. Customers can pay online using a credit, debit card, or internet banking.

Online shopping could be useful in situations when:

A customer does not have sufficient time to visit stores.
Visiting a store is more expensive than purchasing a product online.
A product or service that is not available in the local market is available online.

Q14 List any five websites that allow online transactions.

Ans. Some of the popular online transaction websites are:

IRCTC, an online portal for booking flight and train tickets.
Flipkart, an online shopping portal for buying consumer products.
eBay, an online portal for buying and selling goods.
Redbus, an online portal for booking bus tickets.
Paytm, an online portal for recharge and paying bills.

Q15. List any three payment tools to use online transactions.

Ans. To perform an online transaction, all you need is a web browser and an active internet connection.

In some cases where purchasing is involved, you will need a valid credit card, debit card or online banking support referred to as Net Banking Subscription. Some websites even allow COD (Cash on delivery) where the users can pay once they receive the product or service.

Q16. Explain the purpose of Internet Security.

Ans. Internet security is a branch of computer security specifically related to the Internet, often involving browser security but also network security. Its objective is to establish rules and measures to use against attacks over the Internet. The Internet represents an insecure channel for exchanging information leading to a high risk of intrusion or fraud, such as phishing.