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- 1. Computer Networking DR. C.BEULAH JAYARANI M.Sc., M.A, M.Ed, M.Phil (Edn), M.Phil (ZOO), NET, Ph.D ASST. PROFESSOR, LOYOLA COLLEGE OF EDUCATION, CHENNAI - 34
- 2. Content Introduction Thenetworking devices Types of networks Network topologies Wireless networks Reference 4/18/2022
- 3. The Computer Network A computer network is a group of computers/devices(Nodes) that use a set of common communication protocols over digital interconnections for the purpose of sharing resources located on or provided by the network nodes. The nodes of a computer network may include personal computers, servers, networking hardware, or other specialised or general- purpose hosts.
- 4. Contd., The interconnectionsbetween nodes are formed from a broad spectrum of telecommunication network technologies, based on physically wired, optical, and wireless technologies. A communication protocol is a set of rules for exchanging information over a network. 4/18/2022
- 5. The Networking Devices(Nodes) 1.Repeater 2. HUBs 3. Bridges 4/18/2022
- 6. 1.Repeaters A repeateris a network device used to regenerate a signal. Repeaters boost or amplifies the signal before passing it through to the next section of cable 4/18/2022
- 7. 2. Hubs AHub is a multiport connecting device that is used to interconnect LAN devices A HUB can be used to extend the physical length of a network 4/18/2022
- 8. 3. Bridges Bridgesconvert network data formats and perform basic data transmission management. Bridges provide connections between LANs. They also check data to determine if it should cross the bridge. This makes each part of the network more efficient 4/18/2022
- 9. Types of Networks 1.Local Area Network (LAN) 2. Campus Area Network (CAN) 3. Metropolitan Area Network (MAN) 4. Wide Area Network (WAN) 5. Client Server Network 6. Peer to Peer Network (P2P) 4/18/2022
- 10. 1. local AreaNetwork 1. LAN is a computer network widely used for local communication 2. LAN connects computers in a small area like a room, building, office or a campus spread across a few kilometers 3. They are privately owned networks to exchange information 4. Star, bus and ring are some of the common LAN networking topologies 4/18/2022
- 11. 2. Campus AreaNetwork Larger than LANs, but smaller than metropolitan area networks these types of networks are typically seen in universities, large colleges They can be spread across several buildings that are fairly close to each other so users can share resources 4/18/2022
- 12. 3. Metropolitan AreaNetwork 1. A MAN is larger than a LAN but smaller than or equal in size to a WAN. 2. MAN is a computer network spread over a city. The computers in a MAN are connected using cables 3. MAN connects several LAN spread over a city 4. It covers the distance upto 30-50 km example : cable television network 4/18/2022
- 13. 4. Wide AreaNetwork • WAN is a network that connects computers over a long distances like cities, countries, continents or world wide • WAN uses public, leased or private communication links to spread over long distances 4/18/2022
- 14. k • WAN usestelephone lines, satellite link and radio link to connect • The need to be able to connect any number of computers at any number of sites, results in WAN technology to be different from the LAN technology • It is slower and less reliable than a LAN • INTERNET is a common example of WAN 4/18/2022
- 15. 5. Client/Server Network Ina client/server arrangement, network services are located on a dedicated computer called a server. The server responds to the requests of clients. The server is a central computer that is continuously available to respond to requests from clients for file, print, application, and other services. 4/18/2022
- 16. Contd., Most networkoperating systems adopt the form of a client/server relationship. Typically, desktop computers function as clients, and one or more computers with additional processing power, memory, and specialized software function as servers. 4/18/2022
- 17. 6. Peer toPeer Network Usually very small networks Each workstation has equivalent capabilities and responsibilities Does not require a switch or a hub. These types of networks do not perform well under heavy data loads. 4/18/2022
- 18. Wireless Networks Wireless networkis a type of computer network that uses wireless data connections for connecting network nodes. Example Bluetooth, Wi-Fi 4/18/2022
- 19. Bluetooth Bluetooth is a short-range wirelesstechnology standard used for exchanging data between fixed and mobile devices over short distances. 4/18/2022
- 20. Wi-Fi Wi-Fi Standsfor Wireless Fidelity. Wi-Fi, is a Local Area Wireless technology. Wi-Fi networks use radio technologies to transmit and receive data at high speed. Access point: The access point is a wireless LAN transceiver or “base station” that can connect one or many wireless devices simultaneously to the internet 4/18/2022
- 21. REFERENCE: 1. computer networks-NCERT 2.http://www.svecw.edu.in 3. Basic computer application by Vishal khasgiwala and Sumitra jain 4. Foundation of information technology 4/18/2022