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Network Concepts Week 1

Network Concepts Week 1. The Basics – System Unit Components. Aims. Discussion into what will be covered in this Unit Understand the purpose of a computer network Gain an understanding of the different types of networks. What is covered in this Unit?. Benefits of networks

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Network Concepts Week 1

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  1. Network ConceptsWeek 1 The Basics – System Unit Components HNC COMPUTING - Network Concepts

  2. Aims • Discussion into what will be covered in this Unit • Understand the purpose of a computer network • Gain an understanding of the different types of networks HNC COMPUTING - Network Concepts

  3. What is covered in this Unit? • Benefits of networks • Network principles • Definition of a Network (WANS, LANS etc) • Network Use (network resources) • Design/evaluation • Network architecture concepts (OSI 7 layer model) • Network design HNC COMPUTING - Network Concepts

  4. What is covered in this Unit? – Cont. • Network software • User factors (directory structures) • Login scripts (user environments) • Hardware and Software factors • Network management • Management responsibilities • Resource management HNC COMPUTING - Network Concepts

  5. What is the purpose of a network? • Enables file sharing (should cut down on printing costs) • Share resources, such as printers, scanners, etc., to get more use out of office equipment (cutting down costs) • Share software with multi-user licenses. • Perform data backups quicker and easier with files on shared drives. • Easier and more manageable Internet connection HNC COMPUTING - Network Concepts

  6. Types of Network • LAN (Local area network) • The definition of a LAN has become increasingly vague over the last ten years. • It was understood that it was interconnected computers at one location i.e. college or a workplace. • Know due to faster technology LAN devices can be used over longer distances. • A LAN can be as small as two computers by using a simple Ethernet connection or can divided into sub networks using switches and routers. HNC COMPUTING - Network Concepts

  7. Task • Using Visio try to recreate the LAN shown below. (Feel free to make it your own) HNC COMPUTING - Network Concepts

  8. Types of Network • WAN (Wide area network) • A WAN is a complex network system, comprising of interconnected LANs. • WANs are used to connect LANs and other types of networks together, so that users and computers in one location can communicate with users and computers in other locations. • WANs are often built using leased lines. • Network protocols including TCP/IP deliver transport and addressing functions. HNC COMPUTING - Network Concepts

  9. Several options are available for WAN connectivity: http://en.wikipedia.org/wiki/Wide_area_network HNC COMPUTING - Network Concepts

  10. WAN HNC COMPUTING - Network Concepts

  11. Types of Network • MAN (Metropolitan area networks) • A Metropolitan Area Network (MAN) is a large computer network that spans a metropolitan area or campus. The network size falls intermediate between LANs and WANs. • MANs provide Internet connectivity for LANs in a metropolitan region, and connect them to wider area networks like the Internet. • They typically use wireless infrastructure or optical fiber (or fibre) connections to link their sites. • A MAN (like a WAN) is not generally owned by a single organisation. The MAN, its communications links and equipment are generally owned by either a consortium of users or by a network service provider who sells the service to the users. HNC COMPUTING - Network Concepts

  12. Types of Network • Mesh network • A netlike communications network in which there are at least two pathways to each node. • A fully meshed network means that every node has a direct connection to every other node. Most mesh networks are partially meshed and require traversing nodes to go from each node to every other. HNC COMPUTING - Network Concepts

  13. Task • Go on the internet and try to identify other types of networks. • Here some ideas: PANs, CAMs,VLANs, please write down your findings and/or store web links. • Using the internet look into what a packet is. HNC COMPUTING - Network Concepts

  14. Task - JANET • http://www.emman.net/ • Find out about a network created by academic environments called “Janet”. • What is the different between Janet and “SuperJanet”. • Write notes and/or store web links. • Create a network diagram in Visio to represent “SuperJanet”. HNC COMPUTING - Network Concepts

  15. Conclusion • Discussed what will be covered in this Unit • Considered the purpose of a computer network • Gained an understanding of the different types of networks • Used Visio to create network diagrams HNC COMPUTING - Network Concepts

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