Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.



Published on

To Download this PPT click on the link below:-

Computer network
Types of network
Personal Area Networks (PANs)
Local Area Networks (LANs)
Metropolitan Area Networks (MANs)
Wide Area Networks (WANs)
Classification of Network Architecture
Client-server architecture
Peer-to-peer architecture
Hybrid architecture
Network topology
Bus Topology
Star Topology
Ring Topology
Mesh Topology
Tree Topology
Hybrid Topology

Published in: Education, Technology


  3. 3. INTRODUCTION A computer network is a telecommunications network that allowscomputers to exchange data. The physical connection between networked computing devices isestablished using either cable media or wireless media. The best-known computer network is the internet.
  4. 4. COMPUTER NETWORK A collection of computing devices that are connected in various waysin order to communicate and share resources. Usually, the connections between computers in a network are madeusing physical wires or cables. However, some connections are wireless, using radio waves orinfrared signals.
  5. 5. TYPES OF NETWORK Based on the size and the coverage area, networksare categorized into the following types:Personal Area Networks (PANs)Local Area Networks (LANs)Metropolitan Area Networks (MANs)Wide Area Networks (WANs)
  6. 6. PERSONAL AREA NETWORKS (PANs) A personal area network (PAN) is a computer network used for communicationamong computer and different information technological devices close to oneperson. Is a small network established for communication between differentdevices, such as laptops, computers, mobiles, and PDAs. A pan may include wired and wireless devices. The reach of a pan typically extends to 10 meters.
  7. 7. LOCAL AREA NETWORK(LANs) A local area network (LAN) is a network that connects computersand devices in a limited geographical area such as a home, school,office building, or closely positioned group of buildings. Each computer or device on the network is a node. Wired LANs are most likely based on Ethernet technology.
  8. 8. (WAN)It is relatively larger than LAN and extends across a city or ametropolitan.It is created by connecting two or more LANs located atdifferent locations in a city.
  9. 9. WIDE AREA NETWORK(WANs) A wide area network (WAN) is a computer network that covers a largegeographic area such as a city, country, or spans even intercontinentaldistances. A WAN uses a communications channel that combines many types of mediasuch as telephone lines, cables, and air waves. A WAN often makes use of transmission facilitiesprovided by common carriers, such as telephonecompanies. One of the most prominent examples of theexisting wans is the Internet.
  10. 10. CLASSIFICATION OF NETWORKARCHITECTUREThe architecture of a network is a logical design thatdetermines how the devices in the network communicate.The commonly used architectures for computer networks are: Client-server architecture Peer-to-peer architecture Hybrid architecture
  11. 11. CLIENT-SERVER ARCHITECTURE On a network built using the client-server architecture, thedevices communicate to other devices through a centralcomputer referred to as a server. The server is a terminal with high processing power, whichprovides services for the other computers on the network. The client is a terminal that accesses the resources availableon a server.
  12. 12. PEER-TO-PEER ARCHITECTURE On a network built using the peer-to-peer architecture, no specificdistinction exists between a client and a server. Any node can provide a service as well as send a request for aservice from another node on the network. The peer-to-peer network architecture allows sharing of resources,data, and users. Each node on the network has full control over the networkresources.
  13. 13. HYBRID ARCHITECTURE A hybrid, in general, is a composition of two different types ofelements. A hybrid network architecture is created to get the benefits ofboth, the peer-to-peer and the client-server architectures, in anetwork.
  14. 14. NETWORK TOPOLOGY The pattern of interconnection of nodes in a network is called the Topology. This layout also determines the manner in which information is exchangedwithin the network. The different types of network topologies that can be used to set up anetwork are:Bus TopologyStar TopologyRing TopologyMesh TopologyTree TopologyHybrid Topology
  15. 15. BUS TOPOLOGY Popular topology for data network. Single transmission medium onto which various nodes areattached. Normally coaxial cable is used. Terminators at both end of BUS absorb signal, removing itfrom BUS.
  16. 16. STAR TOPOLOGY The star topology connects nodes over a network using a central control unit called thehub. You can easily add nodes to a star-based network by attaching the required nodes to thehub. Setting up a star topology requires a lot of cabling because allthe nodes have to connect to the hub.
  17. 17. RING TOPOLOGY The ring topology connects the nodes on a network through a point-to-point connection. Data is accepted from one neighboring node transmitted to other. Data travels in one direction. If one of the nodes on the networkstops, the entire network stops functioning.
  18. 18. MESH TOPOLOGY Each node is connected to more than one node. This provide an alternate route mechanism. Excellent for long distance networking. Supports back-up and rerouting. Used in large internetworking environments with stars, rings andbuses as nodes .
  19. 19. TREE TOPOLOGY The tree topology is created where the nodes are connected in ahierarchical manner. In tree topology, the device at the root is referred to as the parentfor all the other nodes or devices in the network. The nodes below a parent node are referredto as child nodes.
  20. 20. HYBRID TOPOLOGY The hybrid topology can be a combination of two or more basictopologies, such as bus, ring, star, mesh, or tree. Hybrid networks combine more than two topologies, which, inturn, enable you to get advantages of the constituent topologies.