Computer networks
- 2. Presentation Usman Ahmed Abid Hammad Ahmad Abbasi
- 3. Usman Ahmed Abid Current Status Student of 2nd year at NHSS
- 4. Hammad Ahmad Abbasi Current status Dronten Holland
- 7. Definition Computer network: A collection of computing devices that are connected in various ways in order to communicate and share resources
- 8. J.C.R Licklider Introduced an idea of Intergalactic Network His idea involved the Global computer network that allowed everyone to access every information from anywhere in the world.
- 9. How many kinds of Networks? • Based on transmission media: Wired (UTP, coaxial cables, fiber-optic cables) and Wireless • Based on network size: LAN and WAN (and MAN) • Based on management method: Peer-to-peer and Client/Server • Based on topology (connectivity): Bus, Star, Ring …
- 10. Network topologies A network topology describes the arrangement of systems on a computer network. It defines how the computers, or nodes, within the network are arranged and connected to each other. Some common network topologies include star, ring, line, bus, and tree configurations.
- 11. Types of Network Topologies a) Star topology b) Ring topology c) Line topology d) Tree topology e) Bus topology
- 12. Star Topology: One central node is connected to each of the other nodes on a network.
- 13. Ring topology: Each node is connected to exactly two other nodes, forming a ring.
- 14. Line : Nodes are arranged in a line, where most nodes are connected to two other nodes. However, the first and last node are not connected like they are in a ring.
- 15. Tree : One "root" node connects to other nodes, which in turn connect to other nodes, forming a tree structure.
- 16. Bus Topology: Each node is connected to a central bus that runs along the entire network.
- 17. Benefits of computer networks • Increase in productivity • Cost savings • Less disk storage • Easy maintenance
- 18. Purposes of computer networks Sharing peripheral devices Sharing of programs and data Communications Remote access Information Security
- 19. Groupware Software that provide facilities for working computers in one group is called groupware. EMAIL CONTACT MANAGEMENT DOCUMENT MANAGEMENT TELECONFERENCING
- 21. Internet The internet is a network of a large number of computer networks In the world. There are three types of computers: 1. HOST 2. SERVERS 3. USERS
- 22. Services of internet I. World wide web II. File transfer protocol III. Electronic Mail IV. Telnet V. Gopher
- 23. Intranet And Extranet Intranet: The internal network of an organization is called Intranet. It is small version of internet.it is mostly used within the organization Extranet: It is mostly used by authorized single user from outside the company.
- 25. BRIDGE Used to connect similar types of networks
- 26. ROUTER Reads the destination address
- 27. Network Protocols Network Protocols are a set of rules or procedures for sending information over the network
- 28. End Thanks friends for watching. If you have any question about this presentation please contact us at : usmanahmedabid@gmail.com