Local Area NetworksLearning ObjectivesLAN: DefinitionServersSelecting a serverPrint ServiceLAN MAC protocolsEthernet (IEEE 802.3) standardsEthernet standardsSpeed: 10 Mbps - Signal type: Baseband w coaxial cable - Distance: 185 meters/segment - Physical bus topology & logical bus topology - No more than 30 nodes (computers, printers, etc.) per segment - Nodes must be spaced at least 0.5 meters apart- Speed: 10 Mbps - Signal type: Baseband - Distance: 100 meters between the Hub/Switch and the node - No more than 1024 nodes per Hub/Switch - Physical star topology, logical bus topology - Uses 2-pair of wire CAT3 UTP with RJ-45 connectorsSpeed: 100 Mbps - Signal type: Baseband - Distance: 100 meters between the Hub/Switch and the node - Topology: Physical star, logical bus using 100BaseTX collection points - Uses two-pair CAT5 or better UTP with RJ-45 connectorsSpeed: 100 Mbps - Signal type: Baseband - Distance: Up to 2 kilometers between sender & receiver - Topology: Physical star, logical bus using 100BaseFX collection points - Uses multi-mode long wavelength fiber optics with lasers as light sourcesLAN systems and standardsSummary QuestionsSlide 16Dual-transmission NICSlide 18Client/Server application ServersFile ServersSlide 21Disk fault toleranceRAIDSlide 24Local Area NetworksSchool of BusinessEastern Illinois University © Abdou Illia, Fall 2014(October 20, 2014)2Learning ObjectivesUnderstand LAN Servers functionsUnderstand common LAN standards3LAN: DefinitionA communication network that interconnects networking devices within a small geographical area using broadcast system.Networking devices include: Computers, Printers, Print Server devices, File Servers, Modems, etc.Q: How many ports for the switch / hub?Different than Point-to-Point transmission system used in WAN4ServersCommon services:File ServiceInternet web serviceEmail serviceFile transfer servicePrint serviceSpecial network services–Autoconfiguration service–Domain name service–Remote Access Service–Internet Connection sharing5Selecting a serverSingle server Versus Multiple specialized Servers–Decision based on Cost, Optimization, Reliability, and SecurityOptimization: –File servers need storage capacity and rapid access–Client/Server applications need very fast processors6Print ServiceA Print Server device is basically: NIC + a parallel or USB port + Random Access Memory + Intelligence to receive data and commands from print queue manager program.Note: Possible to connect printer directly to file server, but people might have to walk far to get their printout.Network printers have built-in NIC & print server hardware. Therefore no need for external print server device.7LAN MAC protocolsToken Ring–For LANs that use physical star topology (with MAU) and logical ring topology –Offered at speeds of 4 and 16 Mbps.–More expensive components than CSMA/CD–Losing ground quickly to CSMA/CDEthernet or CSMA/CD–Most common form of LAN today.–Star-wired bus topology using hub/switch is most common –Many standards (form 10Base2 to Gigabit Ethernet)Two major types of LANRule for effective communicationAll networking devices must use same MAC protocol: All Ethernet hubs/switches and Ethernet NICs OR All Token Ring MAUs and Token Ring NICsCommunications cannot take place if different MAC protocols are being used.Ethernet Hub/switchEthernet NICToken Ring NICMAUEthernet NICToken Ring NIC8Ethernet (IEEE 802.3) standardshttp://grouper.ieee.org/groups/802/index.htmlhttp://standards.ieee.org/getieee802/802.3.html802.3CSMA/CD802.3Ethernet802.3uFast Ethernet802.3zGigabit Ethernet10Base-210Base-510Base-T10Broad-36……100Base-TX100Base-FX100Base-T4……1000Base-SX1000Base-LX1000Base-CX1000Base-T……802.3-200510 Gigabit Ethernet10GBase-T10GBase-CX410GBase-SR10GBase-LX4……9Ethernet standardsQ: If a LAN is described as 10BaseT, list everything you know about that network.Rules for effective communications:All networking devices must use same MAC protocol: All Ethernet hubs/switches and Ethernet NICs OR All Token Ring MAUs and Token NICsDevices should operate at same speed. Example 10BaseT NIC and 10BaseT hub.NICs, Central collection points (hub, switch, MAU), and other internetworking devices should be compatible with the transmission media used.10- Speed: 10 Mbps- Signal type: Baseband w coaxial cable- Distance: 185 meters/segment- Physical bus topology & logical bus topology- No more than 30 nodes (computers, printers, etc.) per segment- Nodes must be spaced at least 0.5 meters apart10Base2 and 10Base5 Ethernet10Base5Speed:10 MbpsSignal type:Baseband transmissionDistance:500 meters10Base2Speed:10 MbpsSignal type:Baseband transmissionDistance:185 meters10Base2- Speed: 10 Mbps- Signal type: Baseband w coax. cable- Distance: 500 meters/segment- Physical bus topology & logical bus topology- No more than 100 nodes per segment- Nodes must be spaced at least 2.5 meters intervals10Base511- Speed: 10 Mbps- Signal type: Baseband- Distance: 100 meters between the Hub/Switch and the node- No more than 1024 nodes per Hub/Switch- Physical star topology, logical bus topology- Uses 2-pair of wire CAT3 UTP with RJ-45 connectors10BaseT Ethernet10BaseTSpeed:10 MbpsSignal type:Baseband transmissionMedium:Twisted pair12- Speed: 100 Mbps- Signal type: Baseband- Distance: 100 meters between the Hub/Switch and the node- Topology: Physical star, logical bus using 100BaseTX collection points- Uses two-pair CAT5 or better UTP with RJ-45 connectors100BaseTX Ethernet100BaseTXSpeed:100 MbpsSignal type:Baseband transmissionMedium:Twisted pair13- Speed: 100 Mbps- Signal type: Baseband- Distance: Up to 2 kilometers between sender & receiver- Topology: Physical star, logical bus using 100BaseFX collection points- Uses multi-mode long wavelength fiber optics with lasers as light sources 100BaseFX Ethernet100BaseFXSpeed:100 MbpsSignal type:Baseband transmissionMedium:Fiber Optic100BaseSX same as 100BaseFX, but uses less expensive short wavelength fiber optics with light-emitting diode (LED) and is limited to 300 m distance14LAN systems and standardsFDDI (Fiber Distributed Data Interface)–Uses Token passing method–Designed for transmission at 100 Mbps using Optical fiber–Possible interconnection of 500 stations–Allows for two concentric ringsThe primary ring offers 100 Mbps data rateSecondary ring for backup or for additional 100 Mbps data rateInner