Class 9 Computer Science Chapter 4 SEBA : Introduction to Internet – Complete Answers

Class 9 Computer Science Chapter 4 SEBA, Class 9 Computer Science Chapter 4 question answers, Introduction to Internet Class 9 SEBA, Chapter 4 class 9 computer science seba, Class 9 Computer Science Introduction to Internet

Looking for SEBA Class 9 Computer Science Chapter 4 solutions? Get complete exercise question answers, solved textbook problems, and key study notes for Chapter 4: Introduction to Internet. Specially designed for Class 9 Assam Board (SEBA) students to prepare effectively and score top marks in exams.

Class 9 Computer Science Chapter 4 SEBA, Class 9 Computer Science Chapter 4 question answers, Introduction to Internet Class 9 SEBA, Chapter 4 class 9 computer science seba, Class 9 Computer Science Introduction to Internet

1. Fill in the blanks:

The connection structure of a computer network is called Topology.
Normally server computers are higher storage capacity than client computers.
An organizations who provide an internet connection to their consumers is called Internet Service Provider (ISP).
Based on relevance search (with ranking), search results are ordered in a search engine.
The sent section of an email interface contain successfully delivered emails.

2. Multiple Choice Questions :

1. A network switch is required to form

A) Star Topology
B) Mesh Topology
C) Ring Topology
D) Bus Topology

Ans: A) Star Topology

2. How many cables are required to from a mesh topology of 10 computers?

A) 15
B) 100
C) 25
D) 45

Ans: d) 45

3. Which of the following not a protocol?

A) HTTP
B) HTTPS
C) ISP
D) FTP

Ans: C) ISP

4. How many repeaters are required to transfer data up to 400 metres using a twisted-pair cable?

A) Not required
B) 4
C) 2
D) 3

Ans: D) 3

5. Normally unsolicited bulk emails appear in

A) Inbox
B) Trash
C) Drafts
D) Spam

Ans: D) Spam

Class 9 Computer Science Chapter 4 SEBA, Class 9 Computer Science Chapter 4 question answers, Introduction to Internet Class 9 SEBA, Chapter 4 class 9 computer science seba, Class 9 Computer Science Introduction to Internet

3. Short Answer Questions:

1. What is topology? From your understanding describe which topology will be best to set up a computer network in your school.

Ans: A topology is the way in which computers are connected to each other in a network.

The Star topology is suitable for a school because all computers are connected to a central switch. It is easy to manage and maintain.

2. Give an example of a URL and describe different sections of it.

Ans: A URL (Uniform Resource Locator) is the address of a resource on the Internet.

Example: https://www.example.com/blog/page_name

The main parts of this URL are:

https – Protocol
www – Sub-domain
example – Root domain
.com – Top-level domain
/blog – Sub-directory
page_name – Web page name

3. What is ranking? How is it related to a search engine?

Ans: Ranking means arranging search results in a particular order. A search engine ranks web pages according to their relevance to the user’s search query. The most relevant results are generally shown higher on the search results page.

4. What is the use of BCC in an email? Describe with an example.

Ans: BCC stands for Blind Carbon Copy. It is used to send a copy of an email to other people without showing their email addresses to the other recipients.

Example: A teacher can send an email to many students using BCC so that the students cannot see each other’s email addresses.

5. What are the differences between Chat and Video Conferencing?

Ans: The differences between Chat and Video Conferencing is given below:-

Chat is used to communicate mainly through text or multimedia messages over the Internet. It usually does not require a camera.

Video conferencing allows two or more people to communicate through live video and audio over the Internet. It usually uses a camera and microphone. Zoom and Google Meet are examples of video conferencing services.

Related to Class 9 Computer Science Chapters of SEBA:

Class 9 Computer Science Chapter 4 SEBA, Class 9 Computer Science Chapter 4 question answers, Introduction to Internet Class 9 SEBA, Chapter 4 class 9 computer science seba, Class 9 Computer Science Introduction to Internet

Some important points for exam on Introduction to Internet

Network Definition: A computer network is an interconnected group of autonomous computers that can share information and resources.
The Internet: The Internet is a global network of interconnected computer networks using standard protocols to communicate worldwide.
Topology: The physical or logical layout/structure in which computers are connected in a network is called Topology.
Network Node: Any device connected to a network, such as a computer, printer, or server, is called a Node.
Client Computer: A computer in a network that requests services or resources from a central server.
Server Computer: A high-capacity central computer that stores files, manages resources, and responds to client requests.
Server vs. Client Capacity: Server computers typically possess higher processing speed and storage capacity than client computers.
ISP (Internet Service Provider): An organization or company that provides internet connectivity services to consumers (e.g., Jio, Airtel, BSNL).

Network Topologies (Hardware & Connections)

Bus Topology: Devices are connected along a single continuous cable called a backbone or bus.
Star Topology: All computers connect individually to a central hardware device like a Switch or Hub.
Switch Requirement: A network switch or hub is mandatory to form a Star Topology.
Ring Topology: Nodes are connected in a closed loop where data travels in one direction from device to device.
Mesh Topology: Every computer is directly connected to every other computer in the network, providing high redundancy.
Network Hardware (Repeater): A device used to regenerate signals over long-distance cable transmission to prevent signal loss.
Repeater Calculation (Twisted-Pair): Standard twisted-pair cables carry signals up to 100 meters without loss; transferring data up to 400 meters requires 3 repeaters.

World Wide Web (WWW) & Web Technologies

WWW Definition: The World Wide Web (WWW) is an information space where documents and web resources are identified by URLs and linked via hyperlinks.
Web Browser: A software application used to access, view, and navigate websites on the World Wide Web (e.g., Google Chrome, Mozilla Firefox).
Text-Based Browser: A non-graphical browser that displays only text (e.g., Lynx).
Web Page: A digital document on the WWW written in HTML, containing text, images, audio, video, and hyperlinks.
Static Web Page: A web page with fixed content that displays the exact same information to every user.
Dynamic Web Page: A web page whose content changes dynamically based on user interaction, time, or inputs.
Website: A collection of related web pages hosted under a single domain name on a web server.
Home Page: The initial or main index web page of a website that loads first.
Web Server: A specialized computer system that stores site files and serves web pages to users over the Internet.

Protocols & Web Addressing

Protocol Definition: A standard set of rules and formats governing data transmission and communication between network devices.
HTTP: Hypertext Transfer Protocol—an application-layer protocol used for transferring hypermedia documents like HTML.
HTTPS: Hypertext Transfer Protocol Secure—an encrypted, secure version of HTTP that protects sensitive data.
FTP: File Transfer Protocol—a network protocol used for transferring files between a client and server on a network.
IP Address: A unique numerical identifier assigned to every device connected to a computer network.
URL: Uniform Resource Locator—the global web address used to locate a specific resource on the Internet.
Two Main Parts of a URL: A standard URL consists of a Protocol Identifier (e.g., https://) and a Resource Name / Domain Address (e.g., [www.example.com](https://www.example.com)).

Search Engines & Algorithms

Search Engine: A web-based tool designed to search for information on the World Wide Web using keywords.
Search Engine Indexing: The process where a search engine organizes and stores website data to enable fast retrieval.
Ordering Search Results: Search engine results are ordered based on a textual search query, query relevance, and page ranking algorithms.
Page Rank: A search engine algorithm metric that evaluates the relative authority, quality, and relevance of a web page.

F. Electronic Mail (E-mail)

Email Definition: Electronic Mail is a digital message exchange method using electronic devices across the Internet.
Inbox Folder: Stores all incoming received email messages.
Sent Folder: Displays emails that have been successfully delivered to recipients.
Drafts Folder: Automatically saves composed emails that have not yet been sent.
Spam Folder: Folder where unsolicited bulk emails, commercial ads, and promotional messages automatically appear.
Trash Folder: Temporarily holds deleted email messages before permanent deletion.
CC (Carbon Copy): Allows sending exact copies of an email to additional recipients, where all addresses remain visible to everyone.
BCC (Blind Carbon Copy): Sends copy of an email to multiple recipients while keeping recipient email addresses hidden from others.

Internet Communication & Online Services

Online Chatting: Real-time text-based communication between two or more users over the Internet.
Video Conferencing: Real-time visual and audio communication between remote users utilizing webcams and microphones over the Internet.
E-Commerce: The buying and selling of goods, products, or services over the Internet.
Social Networking: Online platforms (like Facebook or Instagram) that enable users to build social profiles and connect with others.
Cyber Security Threat (Spam & Malware): Unsolicited emails, viruses, and phishing scams represent major security threats associated with Internet usage.