VIII-COMPUTER LFS-GIDA CHAPTER-1: NETWORKING CONCEPTS

A. Fill in the blanks:

1. Transmission medium

2. Bluetooth

3. PAN

4. Hyperlink

5. 32

6. Protocol

B. State True or False:

1. False

2. True

3. False

4. True

5. False

C. Application Based Questions:

1. Riya can use the Bluetooth technology to transfer the pictures from her mobile to her computer.

2. Mr Nanda will have to use WAN (Wide Area Network) type of network for connecting the computers of his Noida branch with the computers of his head office at Mumbai.

3. In a school campus, CAN (Cluster Area Network) type of network will be suitable.

D. Multiple Choice Questions:

1. (c) Blue

2. (b) Hub

3. (c) Modem

4. (a) Metropolitan Area

5. (c) Infrared

VIII-COMPUTER LFS-GIDA E. Answer the following:

1. A computer network can be defined as a group of computers and other peripheral devices that are linked together for the purpose of sharing data and hardware resources.

2. In a computer network, the data is transferred with the help of transmission medium

(wired or wireless) only.

3. The various advantages of networking are —

Efficient use of storage media: It is more economical to store an application software on a network drive than to store a copy of the application on each user's storage device.

Reduction in hardware costs: In a network, the hardware devices that are not used often like modems, printers, scanners, CD-writers, etc., can be shared. This reduces the total expenditure on hardware.

4. A Coaxial cable consists of central copper wire surrounded by insulation and then a shield of braided wire. A Coaxial cable is used in the transmission of video, communication signals, and audio. The two types of coaxial cables are:

Baseband Coaxial cable: It supports quick transmission of a single signal at a time. It is mainly used for LANs.

Broadband Coaxial cable: It transmits multiple signals at the same time and is used for longer distances.

5. Difference between Bluetooth and Infrared wireless technology are:

Bluetooth infrared connect electronic devices. LEDs to connect devices. technology with a maximum range of technology that covers upto 5 meters of upto 240 meters distance. network (PAN) and can span across penetrate walls or other obstructions different floors of a building. and work only in a direct line of sight.

6. Domain Name is a unique name given to each website or resource connected to the

Internet. Domain names are easier to remember than IP addresses since name has VIII-COMPUTER LFS-GIDA strong correlation with the website. For example, the domain name for Google search engine, is google.co.in and for Wikipedia, it is wikipedia.org.

7. A Gateway is a network point that acts as an entrance to another network using different protocols thereby giving us freedom and convenience to enjoy online activities. It allows us to carry out various online activities, such as sending e-mail, browsing through web pages, buying things online, and more.

8. i. Wi-Fi: Wi-Fi stands for Wireless Fidelity. It creates a Wireless Local Area Network that uses radio waves to send the information. A secure, reliable, and fast wireless connection is established between the electronic devices and the Internet by using this technology. The devices require a wireless adapter connected to them to capture the Wi-Fi signals.

ii. Modem: A modem enables you to connect your computer to the available Internet connection over the existing telephone lines. It converts the digital signals of a computer into analog signals to enable their transmission via phone lines. At the destination, the receiving modem further converts the analog signal into digital signals so that the data can be understood at the receiving end. iii. Cluster Area Network (CAN): CAN, also known as Campus Area Network, is a network comprising a series of small LANs over a small geographical area, such as a college campus. This network covers an area smaller than MAN.

9. i. Hub and Switch

Hub: A hub is a networking device that is used to connect multiple computers and computing devices directly to the network by using cables. A hub sends all the data it receives to all the connected ports.

Switch: Switches contain many ports to connect different network segments. A switch VIII-COMPUTER LFS-GIDA is aware of the addresses assigned to each of its ports and sends the incoming data it receives only to the intended port. ii. Router and Repeater

Router: A Router is a communication device that is used to connect two different networks, such as two LANs, or a LAN and a WAN. It plays a vital role in controlling the traffic and keeping the network efficient. It chooses the best route for the data packets to be transmitted at the receiver's end.

Repeater: A Repeater is a communication device, used to regenerate a signal. It receives electronic signals, cleans them, and retransmits them. Repeaters are needed so that the signals can travel longer distances with the same strength or even at a higher power.