Network Building Blocks Network: The ideas of network was conceived by Bob Matcalfe in 1976 for transporting data between computers Term Area PAN(personal area network) Range of 10 meter-wireless NAN neighborhood area network) Betwwen several bulidings- LAN(local area network) Single building wire of wireless MAN(metropolitan area network) 80 km,Cable television,local WAN(wide area network) Large geographical area. LAN standars: IEEE 802,3 is a network standard. IEEE Institute of electrical and Electronics Engineers)
Network: The ideas of network was conceived by Bob Matcalfe in 1976 for transporting data between computers LAN standars: IEEE 802,3 is a network standard. IEEE ( Institute of electrical and Electronics Engineers) Network Building Blocks Term Area PAN ( personal area network) Range of 10 meter - wireless NAN ( neighborhood area network) Betwwen several bulidings - wireless LAN ( local area network) Single building wire of wireless MAN ( metropolitan area network) 80 km, Cable television, local internet. WAN ( wide area network) Large geographical area
Network Devices NODE: Each connecting point on a network is referred to as a node. e.g.Computers,network peripherals or network devices. Computers Peripherals Devices workstations Network interface Hubs card(NIC) Servers Printers Switches Scanners Routers Storge devices Bridges repeaters Gatways
Network Devices NODE: Each connecting point on a network is referred to as a node. e.g. Computers, network peripherals or network devices. Computers Peripherals Devices workstations Network interface card (NIC) Hubs Servers Printers Switches Scanners Routers Storge devices Bridges repeaters Gatways
Clients,Servers and Peers Clients: Workstation Servers: File Server Application server Printer server Peer To Peer: There is no server in this network
Clients: Workstation Servers: File Server Application server Printer server Peer To Peer: There is no server in this network Clients, Servers and Peers
Topology Start: Advantage:any link can fail without affecting the rest of the network. Ring: failure of any one device can take down the entire network. Bus: bus topology uses a backbone to conect all network devices,if the backbone cable fail,the entire network become unusable. Mesh: If a several link fail,there are still a several possible paths from tits source to its destination. Tree: Is a blend of star and bus network.Tree offer excellent flexbility for expansion
Start: Advantage: any link can fail without affecting the rest of the network. Ring: failure of any one device can take down the entire network. Bus: bus topology uses a backbone to conect all network devices, if the backbone cable fail, the entire network become unusable. Mesh: If a several link fail, there are still a several possible paths from tits source to its destination. Tree: Is a blend of star and bus network. Tree offer excellent flexbility for expansion Topology
Communications Protocols Protocol: is a set of rules for interacting and negotiating Handshaking: Two computers on a network might negotiate thier communications protocols through a process Protocol responsible for: Dividing messages into packets Noise Afficxing addresses to pakket ource Channel Decode Intiating transmission Regulating the flow of data Feedback Checking for transmission errors Acknowledging receipt of tarnsmitted data
Communications Protocols Protocol: is a set of rules for interacting and negotiating Handshaking: Two computers on a network might negotiate thier communications protocols through a process Protocol responsible for: - Dividing messages into packets - Afficxing addresses to pakket - Intiating transmission - Regulating the flow of data - Checking for transmission errors - Acknowledging receipt of tarnsmitted data