Network Presentation
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This document provides an overview of computer networks. It defines a network as a group of connected computers that can share resources and exchange information. Networks allow for resource sharing, reliability through backups, reduced costs, and fast communication. The internet is described as a worldwide network that connects smaller networks through gateways and backbones. Key network components include nodes, servers, network interface cards, switches, routers and protocols that define communication standards. Different network topologies, device types, and classifications like peer-to-peer and server-based networks are also outlined.
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This document provides an overview of computer networks, including their components, characteristics, and classifications. It defines peer-to-peer and client-server networks, describing their advantages and disadvantages. Various network topologies such as bus, star, ring, and mesh are explained. The document also outlines the key standards organizations that set networking guidelines and lists common network hardware functions. Learners will gain an understanding of fundamental network concepts.
Computer networks
This document discusses different types of computer networks, including local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). It also describes common network topologies like bus, ring, star, tree, and mesh. Finally, it covers other network concepts such as network architecture, media, linking devices, and protocols.
computer networking and its application ppt
This document provides an overview of computer networks, including definitions, types, architectures, topologies, and applications. It defines a computer network as a system of interconnected computers that allows for the transfer of information. The three main types of networks discussed are local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). LANs are smallest in size and cover a small physical area like a home or office, while WANs are the largest and span large distances like countries. Client-server and peer-to-peer are described as the two main network architectures. The document also outlines different network topologies including bus, star, ring, tree and mesh, and provides examples of
Lecture 1 Computer Networks.pptxsecond course
This document provides an overview of computer networks, including definitions, types, architectures, topologies, and applications. It defines a computer network as a system of interconnected computers that allows for the transfer of information. The three main types of networks discussed are local area networks (LANs), metropolitan area networks (MANs), and wide area networks (WANs). LANs are smallest in size and cover small physical areas like homes or single buildings. MANs connect multiple LANs within a city, while WANs are the largest and span states, countries or continents. The document also describes common network architectures like client-server and peer-to-peer, and topologies including bus, star, ring and mesh.
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Network Presentation
- 1. NETWORK BY – AKASH SINGH
- 2. WHAT IS A NETWORK ? • Network, in computer science, a group of computers and associated devices that are connected by communications facilities. • Network is an inter connected collection of autonomous computers. • When two or more computers are joined together so that they are capable of exchanging information , they form a network.
- 3. NEED OF NETWORKING ? • Resource sharing - Through a network , data , s/w and h/w resources can be shared irrespective of the physical location of the resources and the user. • Reliability – A file can have its copies on two or more computers of the network. • Reduced Cost – Sharing resources reduces the cost • Fast Communication – Information can be exchanged at a very fast speed.
- 4. WHAT IS INTERNET ? Internet is worldwide network of computer networks. How does it work ? • Most computers are not connected directly to the internet . • They are connected to smaller networks . • Which are connected through gateways to the internet backbone .
- 5. WHAT IS A GATEWAY ? • Gateway is a device that connects dissimilar networks. • A backbone is a central interconnecting structure that connects one or more networks just like the trunk of a tree.
- 6. FEW THINGS RELATED TO NETWORK • Workstation or Nodes : refers to a computer that are attached to a network . • Server or Hub : The master comp is called server, it facilitates the sharing of data .
- 7. WHAT IS NETWORK INTERFACE UNIT (NIU) ? • It is a device attached to each workstation and server. • Helps to make connections within the network. • Each NIU has a unique no identifying it called node address. • NIU is also called terminal access point (TAP). • Also called Network Interface Card (NIC). • Each NIC is given a unique physical address called MAC address.
- 8. HOW DATA IS TRANSMITTED ACROSS NETWORKS ? Switching Techniques are used for transmitting data across networks. 3 types of switching techniques are there. • Circuit Switching , • Message Switching , • Packet Switching .
- 9. TYPES OF NETWORKS • Local Area Network - LAN • Metropolitan Area Network – MAN • Wide Area Network – WAN • Personal Area Network - PAN • Campus Area Network - CAN
- 10. TOPOLOGIES The pattern of interconnection of nodes in a network is called the topology. Types of TOPOLOGIES :- •Bus Topology, •Star Topology, •Ring Topology, •Tree Topology, •Mesh Topology.
- 11. NETWORK DEVICE •Modem , •RJ 45 Connector, •Ethernet Card, •Hub, •Switch, •Repeater, •Bridge, •Router.
- 12. TYPES OF NETWORK Two classifications are • Peer-to-Peer network :- * Nodes provide and request services * User in each node administers resources * No extra investment * Easy to setup * Very weak security * Additional load on nodes . • Server based network :- * Designated computer to administer * Resources centralized * Supports larger networks * Strong security * Expensive .
- 13. OSI MODEL OSI Reference Model • Open Systems Interconnection • No one really uses this in the real world. • A reference model so others can develop detailed interfaces . • Value: The reference model defines 7 layers of functions that take place at each end of communication and with each layer adding its own set of special related functions . • Flow of data through each layer at one time.
- 14. NETWORK PROTOCOLS • Protocol are used for communication between computers in different computer networks. Protocol achieves : * What is communicated between computers? * How it is communicated? * When it is communicated? * What conformance (bit sequence) between computers? • Key elements of a protocol are: * SYNTAC: Data format and signal levels , * SEMANTICS: Control information for coordination and error handling , * TIMING: Synchronization, speed matching, and sequencing . • Examples of protocols: * WAN Protocol: TCP/IP .
- 15. THANK YOU