CH-1_Networking_Concepts

CLASS VIII CHAPTER 1 (NETWORKING CONCEPTS) A. Tick the correct answer: 1. Very expensive. 2. PAN 3. RJ45 4. Tree topology 5. Firewall B. Fill in the blanks: 1. Nodes 2. NIC (Network Interface card) 3. MAN 4. Star topology 5. Tree topology & star topology C. True or False: 1. True 2. False 3. True 4. True 5. False D. Answer the following questions: 1. What do you understand by computer networking ? Name the types of computer network. ANS: A computer network is a group of computers linked to each other that enables the computer to communicate with another computer and share their resources, data, and applications.A computer network also includes other devices called peripheral devices such as printers , scanners etc. A computer network can be categorized by their size. A computer network is mainly of four types:

a. LAN(Local Area Network) b. PAN(Personal Area Network) c. MAN(Metropolitan Area Network) d. WAN(Wide Area Network) 2. Differentiate between PAN & MAN. ANS: PAN (Personal Area Network ) ● Personal Area Network is used for connecting the computer devices of personal use is known as Personal Area Network. ● Personal Area Network is a network arranged within an individual person, typically within a range of 10 meters. ● Personal computer devices that are used to develop the personal area network are the laptop, mobile phones, media player and play stations. MAN(Metropolitan area network ) ● A metropolitan area network is a network that covers a larger geographic area by interconnecting a different LAN to form a larger network within the same city. ● MAN is used by a group of institutes , organizations , branches of banks that function within the same city. 3. Define Client-server architecture. ANS: In Client-server architecture , all the computers called clients are connected to the main computer called Server. A server in a network is a computer that controls all the connected computers , shared devices & other resources. It holds the responsibility for rendering services to a client. A client or workstation is the one that requests services from the server. 4. Define Topology. ANS: A Network Topology is the arrangement with which computer systems or network devices are connected to each other. 5. Explain the various measures to keep the network secure. ANS: There are various methods to keep your network secure: a. Access control- It is used to block unauthorised access. b. Application Security-It protects the application stored in the computer system.

c. Data Loss Prevention- Data loss prevention (DLP) is a set of tools and processes used to ensure that sensitive data is not lost, misused, or accessed by unauthorized users. d. Firewall - It is a security system that protects a computer from unauthorised access over the network. 6. Define : Star Topology , Ring Topology & Bus Topology. ANS: Star Topology: In this network , all the devices are connected to a central device called Hub or Switch. Here , all the information or data first goes to the central device i.e. Hub or Switch and then to the respective systems. In star topology , if the Hub or central device fails , then the entire network goes off. Ring Topology: In this topology , all the computers and peripherals are connected to one another in the form of a Ring. In this , the data travels in a circular manner.In this topology , addition & removal of systems could cause network disruption. Moreover , a single break in the connection disrupts the entire network. Bus Topology : In this topology , all the devices are connected to a linear cable called bus or trunk.The bus acts as a backbone of this network. This network is easy & inexpensive to implement for small networks. The advantage of this network is if one computer system breaks down , it doesn't affect the other system over the network. 7. Define : LAN & WAN. ANS: LAN(Local Area Network) ● Local Area Network is a group of computers connected to each other in a small area such as a building, office. ● LAN is used for connecting two or more computers through wires. WAN(Wide Area Network) ● A Wide Area Network is a network that extends over a large geographical area such as states or countries. ● A Wide Area Network is quite a bigger network than the LAN. ● A Wide Area Network is not limited to a single location, but it spans over a large geographical area through a telephone line, fibre optic cable or satellite links. ● The internet is one of the biggest WAN in the world. ● A Wide Area Network is widely used in the field of Business, government, and education.