Ch. 1 Basics of Networking
CBSE Study Material Solution Class XI Web Application 803
Multiple Choice Questions
1. A number of devices connected with each other through some transmission medium is:
a) Group
b) Network
c) Nodes
d) System
2. The information or data to be communicated through text, numbers, pictures, audio, and video is:
a) Sender
b) Channel
c) Message
d) Receiver
3. The physical path by which a message travels from sender to receiver is:
a) Transmission medium
b) Bandwidth
c) Connection
d) Switch
4. A set of rules that govern data communications and represent an agreement between the communicating devices is called:
a) Data Rules
b) Transmission Laws
c) Data Instructions
d) Protocols
5. Which of these devices cannot be a sender:
a) Computer
b) Stylus
c) Mobile Phone
d) Tablet
6. Which of the following statements are true about communication channels:
a) It is used to send data or signal from one or several senders to one or several receivers.
b) A channel has a certain capacity for transmitting information.
c) It can be either a physical transmission medium or a logical connection, such as a radio channel.
d) All of the above
7. The term for the amount of data that can be transferred from one point to another within a network in a specific amount of time is:
a) Data transfer
b) Baud
c) Bandwidth
d) Network Capacity
8. The speed of travel of a given amount of data from one place to another is called:
a) Data transfer Rate
b) Baud
c) Network Capacity
d) Bandwidth
9. One terabit per second (Tbps) is not equal to:
a) 103 Gigabit per second
b) 108 Megabit per second
c) 109 Kilobit per second
d) 1012 bits per second
10. Which of the following statements is incorrect?
a) The data transfer rate of a network connection is measured in units of bits per second
b) Network equipment manufacturers rate the bandwidth of products in Kbps/Mbps/Gbps.
c) 1 GBps = 1 Gbps
d) Bits per second is the smallest unit measurement for data rate
11. A numerical representation that uniquely identifies an interface or device on the network:
a) Address
b) Token
c) Protocol
d) IP Address
12. Which of the following statements are true for IP Address:
a) IP address is represented as 4 octets of numbers from 0-255.
b) IP address is unique for a device.
c) The full form of IP is Internet Protocol.
d) All of the above
13. What is the full form of Wi-Fi?
a) Wired Fidelity
b) Wireless Fidelity
c) Wireless Filter
d) It has no full form
14. A device that converts analog signals to digital and vice versa:
a) Router
b) Switch
c) Modem
d) Hub
15. Routers connect:
a) LAN
b) WAN
c) LANs and WANs together
d) None of these
16. Which of the following is not true about Gateways?
a) Not as complex as switch or router
b) Work upon different networking models
c) Are also called protocol converters
d) Take data from one system, interpret it, and transfer it to another system
17. Which network device has a buffer and performs error checking before forwarding data?
a) Hub
b) Repeater
c) Switch
d) Router
18. LAN or Local Area Network is about
a) 10m radius
b) 10 km radius
c) 50 km radius
d) No distance limitation
19. If you are sharing songs with your friend through Bluetooth, it is a
a) LAN
b) WAN
c) PAN
d) MAN
20. The Internet is an example of :
a) LAN
b) WAN
c) PAN
d) MAN
21. Various devices connected at home without a server is an example of :
a) Peer to Peer Architecture
b) Client Server Architecture
c) Wi Fi Architecture
d) None of these
22. Which of the following is not a Malware?
a) Ransomware
b) Viruses
c) Trojan horses
d) Instagram
23. _____ in the form of a router prevents malicious software from entering your network from outside the network:
a) Hardware firewall
b) Anti-Virus
c) Malware
d) Gateway
24. The ______ software operates by maintaining a database of malware definitions, which are automatically updated:
a) Operating System
b) Application
c) Anti-Virus
d) Firewall
25. _____ is typically accomplished by flooding the targeted network or resource with superfluous requests in an attempt to overload systems and prevent some or all legitimate requests from being fulfilled.
a) Phishing
b) DOS attack
c) Adware
d) Ransomware
II. Differentiate between
a) Modem and Router
Answer: Modem vs Router
| Modem | Router |
|---|---|
| Modems are commonly used to connect your home network to the internet. A modem converts analog to digital signals and vice versa. A modem does not inspect the data packets before forwarding. | Router can connect Multiple devices and routes the network traffic. Routers create and maintain a local area network. A router inspects all data packets before forwarding them. |
b) Hub and Switch
Answer: Hub vs Switch
| Hub | Switch |
|---|---|
| A hub is a repeater with multiple ports. It cannot filter data. It sends the packets received to all connected devices. Does not find the best path for the packets and is relatively inefficient | This is a smart version of a Hub. It can perform error checking before forwarding data. It has a buffer and forwards good packet selectively to correct port only. It boosts efficiency and performance. |
c) PAN, LAN, MAN and WAN
Answer:
| PAN | LAN | MAN | WAN |
|---|---|---|---|
| PAN stands for Personal Area Network. | LAN stands for Local Area Network. | MAN stands for Metropolitan Area Network. | WAN stands for Wide Area Network. |
| PAN is a computer network formed in small area such as room or a house in up to 10m. |
III. Short answer questions
Q1. What is a computer network?
Q2. What is the Internet?
Q3. What are some of the applications of the Internet?
Q4. What does the term data communication mean?
Q5. What are the five components of data sharing over a network?
Q6. What is a data communication channel?
Q7. What does the term Bandwidth signify?
Q8. Explain maximum and actual Bandwidth with the help of an example.
Q9. Why is actual Bandwidth usually less than the maximum bandwidth ?
Q10. What is Data Transfer Rate?
Q11. What is a Protocol?
Q12. What is the significance of IP Addresses?
Q13. What are the different types of Computer Networks?
Q14. What is PAN (Personal Area Network)?
Q15. Describe the following Network devices briefly:
a) Repeater
b) Hub
c) Switch
d) Router
e) Gateway
Q16. What is Virus and how does it spread?
Q17. How does a firewall protect a network?
Q19. Discuss Phishing and different types of Phishing Scams.
Q20. What is spamming?
IV. Answer the following Competency based / Application based Questions
Q 1. A small organization in your neighbourhood has received a donation of 10 computers and a printer. They want to be able to offer internet and printing facilities in their newly built computer room, what suggestions can you give them. They will also need help with choosing the right network devices.
Q 2. The internet in the computers in the school library is very slow, how can you help them identify the problem.
Q 3. Your uncle is using online banking on his laptop, he does not have anti-virus installed, how will you convince him to have one installed.
V. Group Discussion
- Discuss the pros and cons of the Internet.
- Also discuss how IP addresses can be hidden.
- Discuss the Bandwidth plans offered by various service providers.