Please refer to Introduction to Computer Networks Class 12 Informatics Practices notes and questions with solutions below. These revision notes and important examination questions have been prepared based on the latest Informatics Practices books for Class 12. You can go through the questions and solutions below which will help you to get better marks in your examinations.
Class 12 Informatics Practices Introduction to Computer Networks Notes and Questions
TOPIC -INTRODUCTION TO INTERNET AND WEB
Q1 How to enable/disable cookie in Google Chrome?
Ans. Click on Triple Dots available at right top side -> Setting -> Privacy and setting -> Site setting – > cookies and site data -> Allow / Block cookie. Explore by doing settings in browser.
Similar type of settings may be changed in other browsers.
Q2. What are the types of cookies?
Ans. Session cookies – memorizes your online activities.
Persistent cookies/first-party cookies – tracks your online preferences.
Third-party cookies – collects data based on your online behaviour.
Q3. How to change the setting of Google Chrome Browser?
Ans. Click on Triple Dots available at right top side -> Setting -> and refer various type of settings
Similar type of settings may be changed in other browsers.
Q4. What is a web server. Give examples of some web servers?
Ans. Web Server –
Web server is a computer where the web content is stored. Basically web server is used to host the web sites and deliver the resources requested through web browser. In more technical term it is a program that uses HTTP for serving files that create web pages for users in response to their requests that are sent by the HTTP clients of their computer is called a web server.
Examples of web servers:
Apache web server
IIS –Internet information services by Microsoft
• Apache Tomcat
• Lighthttpd
Q5 .Differentiate Static and Dynamic web page.
Ans
Q6. Explain the different functions performed by web server.
Ans. Functions of a Web Server –
- Stores and secures website data
- Provides web database access
- Serve the end user requests
- Bandwidth controlling to regulate network traffic
- Virtual hosting.
- Server side web scripting
Q7. What is web Hosting? Explain different types of web hosting?
Ans. Web hosting is the place where all the files of your website live. It is like the home of our website where it actually lives. A good way to think about this is if the domain name is the address of our house, then web hosting is the actual house that address points to. All websites on the internet, need web hosting.
There are four main types of web hosting:
• Shared hosting – share by multiple domains/web sites.
• VPS (virtual private server) hosting – The main server is split into multiple virtual servers—hence the name. These virtual servers can be customized by individual websites.
• Dedicated hosting – Websites being hosted on a dedicated server have complete technical control over the server settings. We choose the software, configurations, and anything else we need.
• Cloud hosting – Cloud hosting plans come with multiple remote servers. Each server has different responsibilities. If one of the servers is compromised or has a problem, the other servers on the network will take over those responsibilities and pick up the slack.
• Reseller hosting and WordPress hosting are also specific types of hosting
Q8 Uplifting Skills Hub India is a knowledge and skill community which has an aim to uplift the standard of knowledge and skills in the society. It is planning to set-up its training centers in multiple towns and villages pan India with its head offices in the nearest cities. They have created a model of their network with a city, a town and 3 villages as follows. As a network consultant, you have to suggest the best network related solutions for their issues/problems raised in (i) to (iv) keeping in mind the distances between various locations and other given parameters.
NOTE : In Villages, there are community centers, in which one room has been given as training center to this organisation to install computers. The organisation has got financial support from the government and top IT companies
i. Suggest a most suitable cable layout for the above connections.
ii. Suggest the most appropriate topology of the connection between the wings.
Ans. i.
Q9. Freshminds University of India is starting its first campus Anna Nagar of South India with its centre admission office in Kolkata. The university has three major blocks comprising of Office Block, Science Block and Commerce Block in the 5 km area campus.
As a network expert, you need to suggest the network plan as per (a) to (e) to the authorities keeping in mind the distance and other given parameters.
a. Suggest the authorities, the cable layout amongst various blocks inside university campus for connecting the blocks
b. Suggest the most appropriate topology of the connection between the wings
Ans.
Q11 Vidya Senior Secondary Public School in Nainital is setting up the network between its different wings. There are 4 wings named as SENIOR(S), JUNIOR(J), ADMIN(A) and HOSTEL(H). Distance between various wings are given below:
a. Suggest a suitable Topology for networking the computers of all wings.
b. Suggest the authorities, the cable layout amongst various blocks inside university campus for connecting the blocks
Ans
b. Star Topology
Q12. The university is planning to connect its admission office in Delhi, which is more than 1250km from university. Which type of network out of LAN, MAN, or WAN will be formed? Justify your answer.
Ans. WAN as its large area
Q13.Two universities in different States want to transfer information. Which type of network they need to use for this?
Ans. WAN
Q14. Draw a network layout of star topology and bus topology connecting five computers.
Ans
Q15. Differentiate between Star Topology and Bus Topology. What are the advantages and disadvantages of Star Topology over Bus Topology?
Ans 1. A star topology is a topology for a Local Area Network (LAN) in which all nodes are individually connected to a central connection point, like a hub or a switch
- 2. A bus topology is a topology for a Local Area Network (LAN) in which all the nodes are connected to a single cable.
Advantages and disadvantages of Star Topology over Bus Topology:
Advantage Easy to manage from one point – the switch Easy to add and remove nodes Durable
Disadvantage
• Requires specialist network hardware (the switch)
• Makes the network reliant on the switch’s performance
• A finite number of switch ports limits the network’s size
Q16. The university is planning to connect its admission center in the closest big city which is more than 350 KM from the University. Which type of network out of LAN, MAN, WAN will be formed? Justify your answer.
Ans. MAN
Q17. In above Question No.3. Suggest the topology of the network for efficiently connecting each computer installed in each of the buildings out of the following: (Bus, Star Topology)
Ans. Star Topology
Q18. The organization is planning to connect its new office in Delhi, which is more than 1250 km current location. Which type of network out of LAN, MAN, or WAN will be formed? Justify your answer – WAN
Ans WAN as area is large
Q19 Daniel has to share the data among various computers of his two offices branches situated in the same city. Name the network (out of LAN, WAN, PAN and MAN) which is being formed in this process
Ans LAN
Q21 Write the name of topology in which all the nodes are connected through a single Coaxial cable?
Ans. Bus Topology
Q22 Which of the following Cabling technique is considered best between buildings for establishing LAN? – (Ethernet, Telephone, Optical fiber, Co-axial) – Ans Ethernet
ANs Ethernet
We hope the above Introduction to Computer Networks Class 12 Informatics Practices are useful for you. If you have any questions then post them in the comments section below. Our teachers will provide you an answer. Also refer to MCQ Questions for Class 12 Informatics Practices
