Computer network
Download as PPTX, PDF
10 likes4,341 views
A computer network is defined as the interconnection of two or more computers to enable communication and sharing of resources. Key components include computers, cables, network interface cards, switches, and operating systems. Networks allow sharing of expensive hardware and software, communication between users, and exchange of data and information over wide geographic areas. Networks can use guided media like cables or unguided media like wireless. They provide benefits like increased speed, reduced costs, and centralized management, but also have disadvantages such as high installation costs and potential cable faults. Networks are classified by geography as personal area networks (PAN), local area networks (LAN), metropolitan area networks (MAN), wide area networks (WAN), or campus area networks (CAN). The Internet is
Computer network
- 2. Definition & Applications:- DEFINITION: A computer network is defined as the interconnection of two or more computers. It is done to enable the computers to communicate and share available resources. APPLICATIONS: i. Sharing of resources such as printers ii. Sharing of expensive softwares and database iii. Communication from one computer to another computer iv. Exchange of data and information among users via network v. Sharing of information over geographically wide areas
- 3. Components of Computer Network:- Two or more computers Cables as links between the computers A network interfacing card (NIC) on each computer Switches Software called operating system (OS)
- 4. Networking Transmission Media:- We can group the communication media in two categories: 1) Guided Media: It include cables. 2) Unguided Media: It include waves through air, water or vacuum.
- 5. Guided Media:- Twisted Pair Coaxial Cable Optical Fibre
- 6. Unguided Media:- o Long distance Wireless media: a) Microwave b) Radio Wave c) Satellite o Short distance Wireless media: a) Infrared b) Laser c) Bluetooth d)Wi-Fi e) WiMax
- 7. Network Benefits:- The network provided to the users can be divided into two categories: i. Sharing ii. Connectivity
- 8. Sharing Resources:- Types of resources are: 1. Hardware: A network allows users to share many hardware devices such as printers, modems, fax machines, CD ROM, players, etc. 2. Software: Sharing software resources reduces the cost of software installation, saves space on hard disk.
- 9. Other Benefits of Computer Network:- oIncreased speed oReduced cost oCentralized software managements oElectronic mail oFlexible access
- 10. Disadvantages of Networks:- High cost of installation Requires time for administration Failure of server Cable faults
- 11. Classification of Area by their Geography:- NETWORK PAN LAN WAN MAN CAN
- 12. Local Area Network(LAN):- LAN is a network which is designed to operate over a small physical area such as an office, factory or a group of buildings. These are easy to design and troubleshoot. It is usually a privately owned network. In LAN all machines are connected to a single cable.
- 13. Wide Area Network(WAN):- WAN is a group of computers that are separated by large distances and tied together. It is cheaper and more efficient to use the phones network for the limbs. Most WAN networks are used to transfer large blocks of data between its users.
- 14. Personal Area Network(PAN):- A PAN is a computer network organized around an individual person. It generally consists of a mobile computer, a cell phone or personal digital assistant. The PANs can be constructed using wireless or cables.
- 15. Campus Area Network(CAN):- The CAN is made up of an interconnection of LAN with limited geographical area. Network equipments such as switches, routers and the transmission media i.e. optical fibre etc are almost entirely owned by the campus owner.
- 16. Metropolitan Area Network(MAN):- It is in between LAN & WAN technology that covers the entire city. It uses similar technology as LAN. It can be a single network such as cable TV network, or a measure of connecting a number of LANs or a large network so that resources can be shared LAN to LAN as well as device to device.
- 18. Internet:- Internet is a computer based worldwide information network. The Internet is composed of a large number of smaller interconnected networks. Internet is a decentralised system. It has made it possible for all over the world to effectively and inexpensively communicate with each other.
- 19. SUMMARY:- Definition & Application Components of Computer Network Network Transmission Media Network Benefits Disadvantages of computer network Classification by their geographical area Internet
- 20. Made By :- Ketan Garg , Harmanjeet Singh Aasht & Jaspreet Singh Gill