NETWORKING TECHNOLOGIES (II)LEARNING GOALSProtocolsTCP/IPEthernetEthernet standardsToken RingSummary QuestionsSlide 9Problem1NETWORKINGTECHNOLOGIES (II)BUS3500 - Abdou Illia, Fall 2008(November 4, 2008)2LEARNING GOALSDescribe networking protocols Identify the major protocols used in corporate networks.3ProtocolsAn agreed upon set of rules that govern communication in a networkAll computers on a network must use same protocol for effective communicationExample of protocols: TCP/IP suiteEthernetToken RingComputer 1Rules for Task 1Rules for Task 2Rules for Task 3Rules for Task 4Rules for Task 5Computer 2Rules for Task 1Rules for Task 2Rules for Task 3Rules for Task 4Rules for Task 54TCP/IPTCP/IP suite is named after its two main protocols: TCP and IPTransmission Control Protocol (TCP) Provides a reliable data transfer service between two endpoints on a networkInternet Protocol (IP)Defines a delivery mechanism for packets of data sent between all systems on an InternetIt’s the protocol suite for the InternetTask Sample rules/protocolsApplication HTTP, FTP, SMTPTransport TCP, UDPInternet IPPhysical Ethernet, Token Ring, PPP, Modem standards5EthernetA set of rules for transmitting messages in LANsMost widely used protocol for LANsUses a method called CSMA/CD* for wired LANsCSMA/CD helps determine priority between potential sendersCSMA/CD helps in dealing with collisions1) All computers (“carriers”) listen (“sense”) for traffic on the LAN2) If no traffic, computer that wishes to transmit may transmit3) If collision occurs, computers must wait a random amount of time4) The computer with smallest random number send again first.* Carrier Sense Multiple Access with Collision DetectionCSMA/CD*6Ethernet standards10Base-TSpeed:10 MbpsSignal type:Baseband transmissionMedium:Twisted Pair- Speed: 100 Mbps- Signal type: Baseband- Distance: 100 m between Hub/Switch and node- Uses CAT5 or better UTP with RJ-45 connectors - Star topology: physical star, logical bus100Base-TX100Base-TX: Two Twisted-pairs of Category 5 UTP or STP100Base-FX: Fiber-optic cabling using 2-strand cable100Base-T4: Four Twisted-pairs of Category 3,4, or 5 UTP1000Base-CX: Uses Twinaxial cable1000Base-LX: Uses single-mode Fiber-optic cable (5 km)1000Base-T: 4 Twisted-pairs of Cat. 5 UTP in full-duplex802.3CSMA/CD802.3Ethernet802.3uFast Ethernet802.3zGigabit Ethernet10Base-210Base-510Base-T10Broad-36100Base-TX100Base-FX100Base-T41000Base-SX1000Base-LX1000Base-CX1000Base-CX+ New 10Gbps standard7Token RingOther set of rules for transmitting messages in LANsOnly one node “talks” at a timeA node only transmits when it receives a special packet called a “Token”Only one Token on the ringNo collisions8Summary QuestionsBook Notes1) (a) What is a protocol? (b) Name few protocols used in network.2) Could collisions occur in: (a) Ethernet LANs? (b) Token Ring LANs?3) (a) What is the maximum speed in a 100BaseTX Ethernet LAN? (b) What kind of transmission media it uses?4) Is Token Ring widely used?910ProblemFour students share a dorm. They would like to set up a network in order to share programs and data files. Three of the students own PCs and the fourth student has a laptop computer.a) What computing equipments they need to buy in order to set up the network with a star topology?b) Suppose that they decided to set up a P2P wired network. They have purchased a 10/100BASE-TX 4-port Ethernet hub at www.cdw.com. What kind of physical media they need to
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