Network Basics Networks – 201

Starter Go to the following link http://www.speedtest.net/ Start the speed test Research what Ping and Mbps are

Objectives 5.1.1 Understand why computers are connected in a network 5.1.2 Understand the different types of networks [LAN, WAN, PAN, VPN] 5.1.3 Understand the network media [copper cable, fibre optic cable, wireless] 5.1.4 Understand that network data speeds are measured in bits per second [Mbps, Gbps] 5.1.5 Understand the role of and need for network protocols 5.1.3 Understand the network media copper cable fibre optic cable wireless 5.1.4 Understand that network data speeds are measured in bits per second Mbps Gbps 5.1.9 Understand characteristics of network topologies bus ring star mesh

Understand the Question Confirm Understand the Question Peripherals Site or Building Explain the advantages of networking To connect devices together for communications purposes stand-alone computers into a Unconnected computer Doesn’t communicate with other devices local area network Collection of computers and peripherals connected together within a single site Discuss Textbook search 2 Min

Group Answer the Question Explain the advantages of networking stand-alone computers into a local area network What do you use networked devices for? Why might the school like having devices in a network? Discuss Textbook search Peripherals Site or Building 5 Min Robson, p. 78

Did You Find? Shared resources Communications Device sharing Confirm Did You Find? Shared resources Internet connection, folders and files Communications Emails, instant messaging, file transfer Device sharing Printers, 3D printers, scanners Software sharing Technicians keep single copies of software to automatically download to PCs Security User profiles and logins can be managed centrally See your own files from any PC 3 Min

Find a Definition What is WAN? What is MAN? What is LAN? What is PAN? Group Find a Definition What is common in these terms? Do you think those letters mean the same in all these terms? Do you already know one of these? What is WAN? What is MAN? What is LAN? What is PAN? What is VPN? Please use the textbook for this task: O’Byrne and Rouse, p. 126 10 Min

Confirm Relationships What is the characteristic that makes each of these “area networks” different? Geography – Closeness - Proximity Draw a diagram to show this How about circles? Does yours look like this? Click mouse for a hint. 5 Min

Media Connections Find out about the following connections: -copper cable -fibre optic cable -wireless You need to summarise the advantages and disadvantages. Google: BBC bitesize copper and fibre optic

Protocols Agree on a definition Teacher Protocols Agree on a definition http://www.youtube.com/watch?v=VlKks__ZhI0&list=SP6gx4Cwl9DGBpuvPW0aHa7mKdn_k9SPKO A set of rules or standards that control communication between devices Some you already know about: HTTP POP3, IMAP DNS 8 Min O’Byrne and Rouse, p. 130; Robson p. 83

5.1.3 – Network Media Copper Fibre Optic Wireless Ethernet cables Token Ring cables (largely replaced) Fibre Optic Back-bone of Large Networks TOS Links Wireless

Relative merits of network media Copper Cables Fibre Optic Wireless

Network Topologies 5.1.9 Understand characteristics of network topologies bus ring star mesh

Type Diagram Works? Advantages Disadvantages Bus Star Ring Mesh

Plenary Name 3 different network connections What are the advantages of fibre optic connections over copper? Why are protocols important when sending and receiving data across a network