Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Recursive InterNetwork Architecture (RINA) wikipedia , lookup
Wake-on-LAN wikipedia , lookup
Zero-configuration networking wikipedia , lookup
Distributed firewall wikipedia , lookup
Cracking of wireless networks wikipedia , lookup
Computer network wikipedia , lookup
Piggybacking (Internet access) wikipedia , lookup
Network Concepts 1 THE BASICS – SYSTEM UNIT COMPONENTS HNC COMPUTING - Network Concepts Aims 2 Recap on previous sessions Discuss OSI 7 layer module All students will be able to discuss the attributes of network planning (i.e what to consider...cost, ongoing support, security etc.) Most student will understand the implications of setting up and expanding a network Some student will Identify and discuss the differences between various network topologies (ring, bus, star mesh etc.) Understand the purpose of a network HNC COMPUTING - Network Concepts What is covered in this Unit? 3 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 What is covered in this Unit? – Cont. 4 Network software User factors (directory structures) Login scripts (user environments) Hardware and Software factors Network management Management responsibilities Resource management HNC COMPUTING - Network Concepts What is the purpose of a network? 5 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 Types of Network 6 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. Now, 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 Task 7 Using Visio try to recreate the LAN shown below. (Feel free to make it your own) HNC COMPUTING - Network Concepts Types of Network 8 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 Several options are available for WAN connectivity: 9 http://en.wikipedia.org/wiki/Wide_area_network HNC COMPUTING - Network Concepts WAN 10 HNC COMPUTING - Network Concepts Types of Network 11 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 Types of Network 12 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 Task 13 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 Task - JANET 14 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 HNC COMPUTING - Network Concepts